Respuesta :
Answer:
There are 253 ways to select 5 participants
Step-by-step explanation:
Total number of volunteers to try a new brand of tennis shoes = 10
Number of volunteers to be selected = 5
We are supposed to find number of ways the research group select 5 participants.
We will use combination:
Formula:[tex]^nC_r=\frac{n!}{r!(n-r)!}[/tex]
Substitute n = 10 and r = 5
So,[tex]^{10}C_5=\frac{10!}{5!(10-5)!}[/tex]
[tex]^{10}C_5=252[/tex]
Hence There are 253 ways to select 5 participants
