1. lan has 5 pairs of pants, 5 shirts, and 3 pairs of shoes. He needs to make an outfit containing one of each item. How many different outfits are possible?

2. Using systematic listing, list all the possible outcomes for the experiment of tossing three coins.

3. Using digits 3,4, and 5, how many two digits numbers can be formed if repetition is not allowed?

4. How many different 4-letters code can be formed from the letters H,O,P,E if repetition is allowed?​

help please​