the experimental probability that a delivery service will deliver a package late is 3%. an employee at the delivery service predicts that 45 out of 15,000 packages will be delivered late. is this prediction reasonable?

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r

X2 + y 2 = 36 x + y = 6 solve the system of equations.

Quick! a survey of 57 customers was taken at a bookstore regarding the types of books purchased. the survey found that 33 customers purchased mysteries, 25 purchased science fiction, 18 purchased romance novels, 12 purchased mysteries and science fiction, 9 purchased mysteries and romance novels, 6 purchased science fiction and romance novels, and 2 purchased all three types of books. a) how many of the customers surveyed purchased only mysteries? b) how many purchased mysteries and science fiction, but not romance novels? c) how many purchased mysteries or science fiction? d) how many purchased mysteries or science fiction, but not romance novels? e) how many purchased exactly two types of books?