A psychologist will select 5 preschool children from a class of 11 students in order to try

Question:

A psychologist will select 5 preschool children from a class of 11 students in order to try out new abuse awareness material.
(a) How many different selections are possible?
(b) Suppose 4 of the 11 children are males. If the 5 selected children were to consist of 2 males and 3 females, how many different selections are possible?