1. from the first 5 odd numbers (1,3,5,7 and 9) and the following 4 even numbers (2,4,6 and 8), how many groups of 3 digit numbers can be formed consisting of:

a. 2 odd numbers and 2 even numbers?
b. all even numbers?
c. 3 odd numbers and 1 even number?
d. 2 prime numbers and 1 composite number?

2. students at a private liberal arts college are classified as being freshmen,sophomores,juniors, or seniors, and also according to whether they are male or female. find the total number of possible classifications for the students of that college.

Question

1. from the first 5 odd numbers (1,3,5,7 and 9) and the following 4 even numbers (2,4,6 and 8), how many groups of 3 digit numbers can be formed consisting of: 

a. 2 odd numbers and 2 even numbers?
b. all even numbers?
c. 3 odd numbers and 1 even number?
d. 2 prime numbers and 1 composite number?

2. students at a private liberal arts college are classified as being freshmen,sophomores,juniors, or seniors, and also according to whether they are male or female. find the total number of possible classifications for the students of that college.