Question: Glenn makes five sales calls, with probabilities 0:37, 0:52, 0:48, 0:71, 0:63, of success on the respective calls. Margaret makes four sales calls with probabilities 0:77, 0:82, 0:75, 0:91, of success on the respective calls. Assume that all nine events form an independent class. If Glenn realizes a profit of $18.00 on each sale and Margaret earns $20.00 on each sale, what is the probability Margaret's gain is at least $10.00 more than Glenn's?