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    aarav has 10 friends, and he wants to invite exactly 6 of them to his party. however, he doesn’t want to invite 3 of his friends since they didn’t invite him to their party. how many unique groups of friends can aarav invite?

    Mohammed

    Guys, does anyone know the answer?

    get aarav has 10 friends, and he wants to invite exactly 6 of them to his party. however, he doesn’t want to invite 3 of his friends since they didn’t invite him to their party. how many unique groups of friends can aarav invite? from screen.

    Naresh has 10 friends and he wants to invite 6 of them to a party : Problem Solving (PS)

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    Naresh has 10 friends and he wants to invite 6 of them to a party

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    ak298

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    Naresh has 10 friends and he wants to invite 6 of them to a party [#permalink]

    09 Jul 2020, 06:34 4 Bookmarks 00:00 A B C D E

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    Naresh has 10 friends and he wants to invite 6 of them to a party. How many times will 3 particular friends always attend the party?

    A. 35 B. 120 C. 126 D. 640 E. 720 Show Answer

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    Re: Naresh has 10 friends and he wants to invite 6 of them to a party [#permalink]

    09 Jul 2020, 07:32

    स्रोत : gmatclub.com

    [Solved] Naresh has 10 friends, and he wants to invite 6 of them to a

    Concept: \(\rm ^nC_r = \dfrac{n!}{r!(n-r)!}\) Calculations: Given, Naresh has 10 friends, and he wants to invite 6 of them to a party. Remove the 3 particul

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    Naresh has 10 friends, and he wants to invite 6 of them to a party. How many times will 3 particular friends never attend the party?

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    Concept:

    nCr=n!r!(n−r)!

    Calculations:

    Given, Naresh has 10 friends, and he wants to invite 6 of them to a party.

    Remove the 3 particular friends and invite 6 friends from the remaining = 10 - 3 = 7 friends.

    This can be done in 7C6 ways

    Hence, required number of ways = 7C6

    ⇒required number of ways =

    7!(7−6)!6!

    ⇒required number of ways = 7

    Hence, Naresh has 10 friends, and he wants to invite 6 of them to a party. total number of ways that 3 particular friends never attend the party = 7

    Download Solution PDF

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    Similar Naresh has 10 friends and he wants to invite 6 of them to a party. How many times will 3 particular friends never attend the party?

    Answer (1 of 5): Concept: Calculations: Given, Naresh has 10 friends, and he wants to invite 6 of them to a party. Remove the 3 particular friends and invite 6 friends from the remaining = 10 − 3 = 7 friends. This can be done in 7C6 ways Hence, required number of ways = 7C6 ⇒ required numbe...

    Similar Naresh has 10 friends and he wants to invite 6 of them to a party. How many times will 3 particular friends never attend the party?

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    Author has 3.1K answers and 3M answer views1y

    Concept: Calculations:

    Given, Naresh has 10 friends, and he wants to invite 6 of them to a party.

    Remove the 3 particular friends and invite 6 friends from the remaining = 10 − 3 = 7 friends.

    This can be done in 7C6 ways

    Hence, required number of ways = 7C6

    ⇒ required number of ways = 7! / (7−6)!6!

    ⇒ required number of ways = 7

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    Just ignore 3 who are not to attend. We are left with 7 out of whom 6 are to be selected for party. 7C6 =7 ways

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    Out of 10 we can't consider particular three ,so we have to choose 6 from 7,that is 7c6=7

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    Naresh has 10 friends out of them he wants to invite 6 friends.

    now 3 particular friends will never attend party. so he has to invite 6 friends out of (10–3)=7 friends.

    therefore the total possible ways=7C6=7.

    स्रोत : www.quora.com

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    Mohammed 1 month ago
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    Guys, does anyone know the answer?

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