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# in a class, 60% of the students are girls and there are 20 boys. what is the total number of students in the class?

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## In a class, 60

In a class, 60 Home In a class, 60 Question

In a class, 60% of the students are girls and there are 20 boys. What is the strength of the class?

A 35 B 30 C 40 D 50 Open in App Solution

The correct option is B

50

Let the strength of the class be

x . Given that 60 % are girls, so 40 % are boys. Now, 40 % × x = 20

(Since number of boys in the class is 20)

⇒ 40 100 × x = 20 ⇒ x = 20 × 100 40 ⇒ x = 50

Therefore, total number of students in the class is 50.

Suggest Corrections 4 SIMILAR QUESTIONS

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Solve the following.

There are 60 students in VII std. class. 30% of them are girls. Find the strength of boys.

Q. There are 45 students in a class and

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Q. Class VII has a strength of 50 students out of which 40% are girls. Class VI has a strength of 40 and number of girls are 16. What is the difference in percentages of boys in both the classes?Q.

In a class, 60% of the students are girls and there are 20 boys. What is the total number of students in the class?

Q.

There are 60 students in a class among which 30 are boys. In another class, there are 50 students among which 25 of them are boys. If one from each class is selected, What is the probability of both being girls?

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स्रोत : byjus.com

## In a class of 60 students, the number of boys is 20. What is the ratio of girls to the total number of students?

Answer (1 of 5): In a class of 60 students, if 20 students are children; assuming that the rest are girls we get Number of girls = Total students - Number of boys Number of girls = 60 - 20 = 40 ratio of girls : total students = 40 : 60 ratio can be expressed as division number of girls / num... In a class of 60 students, the number of boys is 20. What is the ratio of girls to the total number of students?

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Sort Lets Learn Aptitude Answered by Manjeet Marwaha

Author has 878 answers and 270K answer viewsJul 13, 2021 Related questions

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In a class, there are 1/4 boys and the number of girls is 30. What is the total number of students in the class?

There are 40 students

we form an algebraic equation using a letter(x) to represent the unknown number of students in the class

Therefore; 1/4(x) + 30 = x

by grouping like terms,

30=x-1/4(x)

30=x(1–1/4). Where (1–1/4)=3/4

30/(3/4)=x x=40 Bruce Bell

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The ratio of boys to girls in a class is 3:2. If there are 36 boys, then how many girls are in the class?

boys girls = 3 2 boysgirls=32 So, girls= 2 3 (boys) girls=23(boys) girls= 2 3 (36) girls=23(36) girls=24 girls=24 Related questions

Total number of students in a class is 90. If the total number of girls in the class is 50, then what is the ratio of total number if boys to total number girls?

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PhD in Management & Strategic Management, University of Kashmir (Graduated 2022)Author has 89 answers and 63.4K answer views4y

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In a 60 student class there are 45 boys and 15 girls. Can you find the percentage of girls in the class?

As we know in class of 60 students, there are 15 girls .

percentage of girls = (no of girls ÷ total no of students) ×100

percentage of girls = ( 15÷60)×100

percentage of girls = 0.25×100

percentage of girls = 25%

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Total number of students in a class is 180. If the total number of girls in the class is 90, then what is the ratio of total number if boys to total number girls?

Given that they are 180 students in a class

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So the ratio of number of boys to number of girls is 1:1

Pramit Kumar Chandra

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There are 150 students in a class, out of which 2/5 are girls. What is the number of boys in the class?

The main assumption behind the question lies is the fact that we need to assume that there are no transgenders in the class. If done , the question becomes quite easy .

Number of girls= 2/5* 150= ( 2*150)/5= 60

From our assumption,

number of boys+ number of girls= number of students

Hence, number of boys = 150-60 = 90

Solved :)

P.S - I am not against transgenders . I stand for them. The unacceptance of the third sex lies in this very basic fact that from a very young age we are taught that there are only 2 sexes .

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स्रोत : www.quora.com

## [Solved] In a class, 60% of the students are girls and the rest are b

Given: Part of the students which are girls = 60% ⇒ Part of the students which are boys = 40% Percentage of girls passed = 45% Percentage of boys faile Home Quantitative Aptitude Percentage

## In a class, 60% of the students are girls and the rest are boys. 45% of the girls pass an examination and 40% of the boys failed. If the number of girls who failed is 66, the number of boys who passed the examination is:

This question was previously asked in

SSC CHSL 2020 Official Paper 7 (Held On: 15 April 2021 Shift 1)

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60 48 36 54

## Answer (Detailed Solution Below)

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## Detailed Solution

Given:

Part of the students which are girls = 60%

⇒ Part of the students which are boys = 40%

Percentage of girls passed = 45%

Percentage of boys failed = 40%

No of girls failed = 66

Calculation:

Let the total number of students be 100a

⇒ No of girls = 60a ⇒ No of boys = 40a

No of girls failed = (100 - 45)% × 60a =  55/100 × 60a

⇒ 33a

As per the question;

⇒ 33a = 66 ⇒ a = 2 ⇒ 100a = 200

Percentage of boys who passed the exam = (100 - 40)% × 40a

⇒ 24a ∴ 24a = 24 × 2 = 48

⇒ The number boys who passed the exam is 48.

Shortcut Trick

By Tree Method

Let the total number of students = 100 ∴ The number boys who passed the exam is 48.Alternate Method

Using unitary method:

The number of girls who got failed = (100 - 45)% = 55% = 66

⇒ 1% = 1.2

⇒ The number of girls = 100% = 1.2 × 100 = 120

But these are 40% of the total students.

Now, 60% = 120 ⇒ 1% = 2

⇒ The total number of students = 100% = 200

⇒ The number of boys = 200 - 120 = 80

The number of boys passed = 80 × 60/100 = 48

∴ The number boys who passed the exam is 48.

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## More Percentage Questions

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Mohammed 15 day ago

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