Marcus works as a waiter on the weekends and in the evenings after classes.7% of the time he gets a customer's food order wrong.3% of the time he gets a customer's drink order wrong.Two percent of the time, he gets both orders wrong.According to these numbers, if Marcus gets a customer's drink order wrong, how likely is it that he gets the customer's food order wrong, as well?
A).333
B).060
C).667
D).210
E).014

Question

Quizplus · Accepted Answer

The probability that Marcus gets both orders wrong is 2%. The probability that he gets a drink order wrong is 3%. The conditional probability that he gets the food order wrong given that he got the drink order wrong is 2% / 3% = 0.667.

Marcus Works as a Waiter on the Weekends and in the Evenings