Explain how you decided on the number of zeros in the product from a b and c

Which is greater, 7 p 5 or 7 c 5? 7p5 7c5

What number is 7 units left of -15?

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