Question

In how many ways can the first 4 guest arrive at a party if 15 guest have been invited

Answer 1

Answer:

The first 4 guests can arrive at party in 1365 ways if 15 guest have been invited

Step-by-step explanation:

Total number of guests invited = 15

We are supposed to find in how many ways can the first 4 guest arrive at a party if 15 guest have been invited

We will use combination

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

Substitute n = 15 and r = 4

So,Total no. of ways = $\frac{15!}{4!(15-4)!}=1365$

Hence the first 4 guests can arrive at party in 1365 ways if 15 guest have been invited

Answer 2

Answer:

32,760

Step-by-step explanation:

The first 4 guests can arrive in 32,760 ways.