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8 December, 01:01

How many different ways are there to select 24 donuts if there are 7 types of donuts available (and donuts are only distinguished by their type).?

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Answers (2)
  1. 8 December, 01:34
    0
    593,775 ways

    Step-by-step explanation:

    24 donuts have to be selected from 7 different varieties of donuts

    n = 7

    r = 24

    Repetition is allowed

    C (n+r-1, r) = C (7 + 24 - 1, 24)

    = C (30,24)

    Recall that C (n, r) = n! / (n-r) ! r!

    C (30,24) = 30! / (30 - 24) ! 24!

    = 30! / (6!24!)

    = 593,775 ways
  2. 8 December, 02:24
    0
    Answer: 346,789 ways

    Step-by-step explanation:

    Using the formular for permutation to calculate:

    P = n!/r! (n-r) !

    We need to select 24 apples from 7 types of apples

    n=24, r=7

    Permutation = 24!/7! (24-7) !

    Permutation = 6.2*10^23/1.793*10^18

    P = 346,789 ways
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