if you want to remove an article from website contact us from top.

    the average of 5 numbers is 7. the average of top 2 number is 3 and average of last two number is 6 . what is the third number

    Mohammed

    Guys, does anyone know the answer?

    get the average of 5 numbers is 7. the average of top 2 number is 3 and average of last two number is 6 . what is the third number from screen.

    If the average of five numbers is 10 , and the fifth number is 6 , find the average of the first four numbers.

    Click here👆to get an answer to your question ✍️ If the average of five numbers is 10 , and the fifth number is 6 , find the average of the first four numbers.

    Question

    If the average of five numbers is 10, and the fifth number is 6, find the average of the first four numbers.

    A

    9

    B

    10

    C

    11

    D

    12

    E

    13

    Easy

    स्रोत : www.toppr.com

    [Solved] The average of 3 numbers is 7 and the average of first two n

    Given: The average of 3 numbers = 7 The average of the first 2 numbers = 4 Formula used: Average = (Sum of values/number of values) Calculation: The avera

    Home Quantitative Aptitude Average

    Question

    Download Solution PDF

    The average of 3 numbers is 7 and the average of first two numbers is 4. What is the third number?

    This question was previously asked in

    REET 2015 Level 1 (Hindi-I/English-II) Official Paper

    Attempt Online

    View all REET Papers >

    15 13 7 4

    Answer (Detailed Solution Below)

    Option 2 : 13 Crack REET with

    India's Super Teachers

    FREE

    Demo Classes Available*

    Explore Supercoaching For FREE

    Free Tests

    View all Free tests >

    FREE

    CT 1: Growth and Development - 1

    1Lac Users

    10 Questions 10 Marks 10 Mins

    Start Now

    Detailed Solution

    Download Solution PDF

    Given:

    The average of 3 numbers = 7

    The average of the first 2 numbers = 4

    Formula used:

    Average = (Sum of values/number of values)

    Calculation:

    The average of 3 numbers = 7

    Sum of 3 numbers ⇒ 7 × 3 ⇒ 21

    The average of 2 numbers = 4

    Sum of 2 numbers ⇒ 4 × 2 ⇒ 8

    Third Number = 21 – 8 = 13

    ∴ The third number is 13.

    Download Solution PDF

    Share on Whatsapp

    With hundreds of Questions based on Average, we help you gain expertise on Quantitative Aptitude. All for free. Explore Testbook Learn to attain the subject expertise with us.

    India’s #1 Learning Platform

    Start Complete Exam Preparation

    Daily Live MasterClasses

    Practice Question Bank

    Mock Tests & Quizzes

    Get Started for Free

    Download App

    Trusted by 3,17,13,925+ Students

    ‹‹ Previous Ques Next Ques ››

    More Average Questions

    Q1. The average of 25 numbers is 48.2. If the average of the first 10 numbers is 47 and the average of the last 12 numbers is 49, then find the average of 58, 69 and the remaining numbers.Q2. Renu's marks were wrongly entered as 99 in place of 9. Due to this error, the average marks of the class were 2.25 more than the actual average. What is the number of students in the class?Q3. Find the value of

    2k+11

    , where k is average of 16, 25, 13, 26 and 15.

    Q4. The average of 30 numbers is 55. The average of the first 15 numbers is 51 and the average of the last 12 numbers is 56. What is the average of 68, 74 and the remaining 3 numbers?Q5. The mean of a certain number of observations is 12. If one observation is removed and the mean remains unaltered, then the removed observation is:Q6. The average height of a class of 30 students is 1 m 50 cm. 6 new students increase the average height to 1 m 55 cm. Determine the average height of the 6 new students.Q7. The sum of three consecutive odd numbers is 165. What is the sum of the largest number and twice the smallest number?Q8. The average age of all the 16 professors of LK University is 52 years. After four years what will be the average age of all the 16 professors if there is no retirement or recruitment?Q9. The average of five numbers is 78. If the average of the first two numbers is 54 and the average of the last two numbers is 63, then the third numbers is:Q10. There are four different numbers. The average of the first three numbers is three times the fourth number, and the average of all the four numbers is 55. What is the average of the first three numbers?

    स्रोत : testbook.com

    The average of 5 numbers is 9 and the average of the last three numbers is 5. What is the average of the first two numbers?

    Answer (1 of 12): \frac{x_{1}+x_{2}+x_{3}+x_{4}+x_{5}}{5} = 9\\ \frac{x_{3}+x_{4}+x_{5}}{3} = 5\\ x_{3}+x_{4}+x_{5} = 15\\ x_{1}+x_{2}+x_{3}+x_{4}+x_{5} = 45\\ x_{1}+x_{2} = 45-(x_{3}+x_{4}+x_{5})\\ x_{1}+x_{2} = 45-15 = 30\\ \text{ Average } = \frac{\text{Sum of numbers}}{\text{ No of numb...

    The average of 5 numbers is 9 and the average of the last three numbers is 5. What is the average of the first two numbers?

    Ad by Amazon Web Services (AWS)

    AWS is how.

    AWS removes the complexity of building, training, and deploying machine learning models at any scale.

    Sort Niranjan Krishna

    Loves Mathematics and Physics.Author has 143 answers and 80.8K answer views2y

    x 1 + x 2 + x 3 + x 4 + x 5 5 =9 x1+x2+x3+x4+x55=9 x 3 + x 4 + x 5 3 =5 x3+x4+x53=5 x 3 + x 4 + x 5 =15 x3+x4+x5=15 x 1 + x 2 + x 3 + x 4 + x 5 =45 x1+x2+x3+x4+x5=45 x 1 + x 2 =45−( x 3 + x 4 + x 5 ) x1+x2=45−(x3+x4+x5) x 1 + x 2 =45−15=30 x1+x2=45−15=30 Average = Sum of numbers No of numbers

    Average =Sum of numbers No of numbers

    ∴ Average = x 1 + x 2 2 ∴ Average =x1+x22 = 30 2 =302 =15 =15 Related questions

    The average of 9 numbers is 30. The average of first 5 numbers is 25 and that of the last 3 numbers is 35. What is the 6th number?

    The average of 7 numbers is 9. The average of 3 of them is 5. What is the average of other 4 numbers?

    In a set of three numbers, the average of first two numbers is 5, the average of the last two numbers is 6 , and the average of the first and the last numbers is 4 . What is the average of three numbers?

    The average of five numbers is six. Out of these five numbers, the average of three numbers is four. What will the average be of the other two numbers?

    The average of 9 numbers is 18. The average of the first 5 numbers is 22 and that of the last 3 numbers is 15. What are the 6th numbers?

    Sumanta Kumar Nandi

    Senior Section Engineer at Ministry of Railways, India (1988–present)2y

    Total of 5 numbers is 5×9=45

    Total of last 3 numbers is 5×3=15

    Total of remaining 2 numbers is 45–15=30

    Average of 2 numbers is 30÷2=15

    Sponsored by Grammarly

    Communicate effectively throughout your writing universe.

    Grammarly for Windows and Mac offers writing feedback in Slack, Word, Gmail, and beyond. Install it now!

    Nandan Singh

    Private Tutor (2001–present)Author has 619 answers and 668.2K answer views2y

    Sum of all five numbers =5*9=45

    Sum of the last 3 numbers =3*5=15

    Sum of the first 2 numbers =45–15=30

    Average of the first two numbers. =30/2=15.

    Ankaleshwar Shiv

    Algebra, Geometry and TrigonometryAuthor has 94 answers and 163.7K answer views3y

    Related

    The average of three numbers is 29. The average of two of these numbers is 38. What is the third number?

    Let the three numbers be x, y and z.

    As per question: (x+y+z)/3 = 29

    so, x+y+z = 29*3 = 87

    Also,

    average of any two numbers i.e., (x+y)/2 = 38

    so, x+y = 38*2 = 76

    Hence, The third number z = 87 - 76 = 11

    Related questions

    What is the average of 5 and what number is 9?

    The average of 8 numbers is 20 and average of 5 numbers is 14. What is the average of 3 numbers?

    The average of 5 numbers is 14. The average of three of the numbers is 12. What is the average of the other two numbers?

    The average (mean) of three numbers is 10. The first two numbers are 10 and 4. What is the third number?

    The average of 25 numbers is 48.2. If the average of the first 10 numbers is 47 and the average of the last 12 numbers is 49, what is the average of 58, 69 and the remaining numbers?

    Udit Gautam

    Former Member at The Placement Cell, PGDAV College (2022–2022)2y

    Let the five nos. be a, b, c, d and e.

    Given, (a+b+c+d+e)/5=9 So, =>a+b+c+d+e=5×9=45 Also given, (c+d+e)/3=5 So, =>c+d+e=5×3=15 So, =>a+b+15=45 =>a+b=45–15=30 Now, =(a+b)/2 =30/2 =15

    Hence, the average of first two numbers is 15

    Hope it helps Thank you Roland Neville

    Former Retired Teacher, Formerly in Engineering.Author has 797 answers and 180.7K answer views2y

    Related

    The average of five numbers is six. Out of these five numbers, the average of three numbers is four. What will the average be of the other two numbers?

    Average of all five is 6 → total is 30

    Average of three is 4 → Total of the three is 12

    → Total of the last two is 18

    → Average of the last two is 9

    DigitalOcean

    Simplifying cloud computingJul 6

    Promoted

    What is a step-by-step guide to learn cloud computing? I want to go from a beginner to advanced.

    Helping people level up their cloud computing knowledge is what the DigitalOcean Community

    is all about! Check out these tutorials and posts for more info:

    Our general introduction to cloud computing

    A Linux command line primer

    How to use SQL

    How to deploy a static website to the cloud with DigitalOcean App Platform

    Krishna Singh

    Bachelor of Science in Statistics (academic discipline) & Mathematician And Theoretical Physicist, Patna Science College, Patna (Graduated 2020)Author has 451 answers and 1.5M answer views3y

    स्रोत : www.quora.com

    Do you want to see answer or more ?
    Mohammed 8 day ago
    4

    Guys, does anyone know the answer?

    Click For Answer