7. Assume that the weight of an of orange has an average of 200 grams with a standard deviation of 50 grams. The weight follows a normal distribution. Assume that oranges cost 2.50 E per kg. Assume that the weight of a grapefruit follows a normal distribution with expected value of 600 grams and a standard deviation of 100 grams. Assume that grapefruits cost 3.50 & per kg. Tom buys 20 oranges and Jerry buys 5 grapefruits. Find the probability that the amounts they have to pay deviate by more than 2.00 E