What is the measure of e?

Pls , the question is in the picture!

Fredrick designed an experiment in which he spun a spinner 20 times and recorded the results of each spin

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