331 students went on a field trip. Six buses were filled and 7 students traveled in cars. How many students were in each bus? Include a let statement in your answer.

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