At a restaurant, the ratio of customers that select water to customers that select something else is 3:5. If 120 customers selected water on Friday, how many customers did the restaurant serve that day?

Peter applied to an accounting firm and a consulting firm. he knows that 30% of similarly qualified applicants receive job offers from the accounting firm, while only 20% of similarly qualified applicants receive job offers from the consulting firm. assume that receiving an offer from one firm is independent of receiving an offer from the other. what is the probability that both firms offer peter a job?