To determine the effect their salespersons have on purchases, a department store polled 700 shoppers regarding whether or not th
ey made a purchase and whether or not they were pleased with the service they received. Of those who made a purchase, 151 were happy with the service and 133 were not. Of those who made no purchase, 201 were happy with the service and 215 were not. Use probability rules (when appropriate) to find the probability (p) of the event stated. (a) A shopper was happy with the service received.
p =
(b) A shopper was unhappy with the service received.
p =
