Question

Help please

1. how many 5-digit zip codes can be formed if the first digit cannot be 0 or 1, and if not no digit can be repeated ?

2. how many ways can a president, vice president, Treasurer and secretary be chosen for a committee of 9 people?

3. a standard die rolls 4 times. Find p (four 2s).​

Answer 1

Explanation:

30240 without any repeating numbers

72 ways to choose a president and vice president

I am not sure of the last problem