Agardner uses 1/3 of a liter of water to water 2/7 of a garden. watering the entire garden at this rate will require how many liters of water

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