Hi

21 students: 12F, 9S

 5 students are selected at random

P(2F)  = 

P(at least one S) =  = 1 - 12C5/21C5   (1-P(5F)) 

RELATED QUESTIONS

In a statistics class there 30 females and 20 males; 18 of the females are freshmen and... (answered by fractalier)

in the class,there are 12 freshman, of whom 8 are males and 15 sophomores of whom 5 are... (answered by Edwin McCravy)

In a class of 35 students, 11 are seniors, 8 are juniors, 9 are sophomores, and 7 are... (answered by Theo)

In a class of 35 students, 11 are seniors, 8 are juniors, 9 are sophomores, and 7 are... (answered by ikleyn)

A football team consists of 19 each freshmen and sophomores, 14 juniors, and 17 seniors.... (answered by Boreal)

A football team consists of 20 freshmen and 20 sophomores, 15 juniors, and 10 seniors.... (answered by ewatrrr)

in a particular class, there are 3 freshman, 5 sophomores, 11 juniors, and 2 seniors. if... (answered by stanbon)

Can I please have some help with process?

There are 14 freshmen and 7 sophomores in a... (answered by Maths68)

Prof. Shanks assigns 6 students to work on a project. The group is to have no more than 1  (answered by greenestamps)