Simplify (5^3 x 5^5)^5 a. 5^13 b. 5^20 c. 5^75 d. 5^40

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