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RoseWind [281]
3 years ago
15

An experiment involves 31 participants. From these, a group of 5 participants is to be tested under a special condition. How man

y groups of 5 participants are possible?
Mathematics
1 answer:
zzz [600]3 years ago
3 0

Answer:

169911 groups of 5 participants are possible

Step-by-step explanation:

Total no. of participants = 31

We are supposed to find no. of groups of 5 participants are possible

We will use combination over here  :

Formula : ^nC_r=\frac{n!}{r!(n-r)!}

Substitute r = 5

n = 31

So,no. of groups of 5 participants are possible =^nC_r

So,no. of groups of 5 participants are possible:

\frac{31!}{5!(31-5)!}=169911

Hence 169911 groups of 5 participants are possible

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Given : A pet supply store sells a 20-pound bag of dog food $23.44.

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