Use the addition rule or multiplication rule for probability.
-During its grand opening week, Stickler's bicycle shop offers a "wheel of discount
Savings." After customers select the items they wish to purchase, they spin the wheel to
Determine the discount they will receive. The wheel is divided into 12 slices. Six slices
Are red and award a 10% discount, three slices are white and award a 20% discount, and
Two slices are blue and award a 40% discount. The remaining slice is gold and awards a
100% discount! The probability that two customers in a row get a 20% discount is
A) 3 / 12
B) 2 / 12
C) .0625
D) 9 / 12
E) 10 / 12

Question

Quizplus · Accepted Answer

The probability of one customer getting a 20% discount is 3/12. For two customers in a row, multiply the probabilities: (3/12) * (3/12) = 9/144 = 0.0625.

Use the Addition Rule or Multiplication Rule for Probability