If a customer at a particular grocery store uses coupons, there is a 50% probability that the customer will pay with a debit card. Thirty percent of customers use coupons and 35% of customers pay with debit cards. Given that a customer pays with a debit card, the probability that the same customer uses coupons is ------- .

Question

Quizplus · Accepted Answer

Using Bayes' theorem, P(Coupons | Debit) = P(Debit | Coupons) * P(Coupons) / P(Debit) = 0.50 * 0.30 / 0.35 = 0.43.

If a Customer at a Particular Grocery Store Uses Coupons