Eighteen friends are going to the beach. If each car holds 5 people, how many cars need to be driven to the beach in order for all of the friends to have a ride?

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