1) How many sequences of 5 things can be formed from 7 different things with replacement and order is important?

2) How many permutations can be formed by sampling 4 things from 8 different things without replacement?

3) How many committees of 4 people can be formed from 7 people?

4) Commute the probability that both customers purchase (#purchases=2) and enter answer with 3 decimal points.

P(Customer makes a purchase)= 0.850

P (Customer does not make purchase) = 1-0.850