Question

3 students are selected at random from a class consisting of 5 freshman, 3 sophomores, and 2 juniors. Find the probability that 2 freshman and 1 junior are selected given that at least 1 freshman is selected.

Answer 1

P(A|B)={Probability of A given B}=P(AB)/P(B)

Can you figure it out from there?

Answer 2

i know the probability of selecting 2 freshman and 1 junior, but i dont understand how to include that 'given at least 1 freshman' part .

Answer 3

no i cant

Answer 4

probability of 2 fresh and 1 junior is
5C2 * 2C1 / ( 10 C3)

Answer 5

thanks for your help. i already knew that formula .