A single card is drawn from a standard 52 card deck. Work out the probability of choosing the "9 of
spades"
Give your answer in its simplest form

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