A bicycle shop equips 60% of their bikes with a water bottle holder. 55% of the bikes they sell have a kickstand attached to the bike. 34% of the bikes sold have both features
-What is the probability that a randomly selected bicycle will have a kickstand or a water bottle holder?
A) 56.7%
B) 34%
C) none of these
D) 61.8%
E) 81%

Question

Quizplus · Accepted Answer

To find the probability that a randomly selected bicycle will have a kickstand or a water bottle holder, we use the formula for the union of two events: P(A or B) = P(A) + P(B) - P(A and B). Here, P(A) = 60% (probability of having a water bottle holder), P(B) = 55% (probability of having a kickstand), and P(A and B) = 34% (probability of having both). Therefore, P(A or B) = 60% + 55% - 34% = 81%.

A Bicycle Shop Equips 60% of Their Bikes with a Water