John and Mary order pizzas. The pizza shop offers only plain, anchovy, and sausage pizzas with no multiple toppings. The probability that John gets a plain (resp., anchovy) is .1 (resp., .2) and the...

John and Mary order pizzas. The pizza shop offers only plain, anchovy, and sausage pizzas with no multiple toppings. The probability that John gets a plain (resp., anchovy) is .1 (resp., .2) and the probability that Mary gets a plain (resp., anchovy) is .3 (resp., .4). Assuming that John and Mary order independently, use Exercise 17 to find the probability that neither gets a plain but at least one gets an anchovy.