4 students from a class of 15 are going to be chosen to be on the dance committee. Find the number of different 4-person committ

Question

motikmotik

2 years ago

11

4 students from a class of 15 are going to be chosen to be on the dance committee. Find the number of different 4-person committ

ees that can be made.

Mathematics

2 answers:

Andreyy89 · Answer 1 · 2022-08-16T21:57:37+03:00

Andreyy892 years ago

8 0

Answer:

1365

Step-by-step explanation:

formula for combination

n!/r!(n-r)!

Andrej [43] · Answer 2 · 2022-08-16T20:04:06+03:00

We know that
The formula for combinations is
C=n!/[(n-r)!*r!]
where
n is the total number of objects you choose from
r is the number that you choose to arrange

in this problem
n=15 students
r=4 students
C=15!/[(15-4)!*4!]-----> C=15!/[11!*4!]---> (15*14*13*12*11!)/(11!*4*3*2*1)
C=(15*14*13*12)/(24)----->C=1365

the answer is
1365