Find the sum of the geometric sequence. 1 divided by 3, 2 divided by 3, 4 divided by 3, 8 divided by 3, 16 divided by 3

At a pizza shop 70% of the customers order a pizza 25% of the customers order a salad and 15% of the customers order both a pizza and a salad if s customer is chosen at random what is the probability that he or she orders either a pizza or a salad