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Vlada [557]
3 years ago
11

You want to distribute 7 candies to 4 kids. If every kid must receive at least one candy, in how many ways can you do this?

Mathematics
1 answer:
Sergeeva-Olga [200]3 years ago
5 0

Answer:

  20  

Step-by-step explanation:

Once you give 1 candy to each of the 4 kids, you will have 3 remaining. The number of ways those can be distributed to 4 kids is given by ...

  (n+k-1)C(n)

where n is the number of candies, and k is the number of kids. "aCb" is the number of ways a can be taken b at a time:

  aCb = a!/(b!(a-b)!)

For n=3 and k=4, this is ...

  (3+4-1)C(3) = 6C3 = 6!/(3!·3!) = 20

There are 20 ways to distribute 7 candies to 4 kids so that each kid receives at least one.

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