A recent survey of local cell phone retailers showed that of all cell phones sold last month, 64% had a camera, 28% had a music player and 22% had both.The probability that a cell phone sold last month had a camera or a music player is ______________ .
A).22
B).70
C).92
D).30
E).08

Question

Quizplus · Accepted Answer

To find the probability that a cell phone sold last month had either a camera or a music player, we use the formula for the union of two sets: P(A or B) = P(A) + P(B) - P(A and B). Here, P(A) = 64% (phones with a camera), P(B) = 28% (phones with a music player), and P(A and B) = 22% (phones with both). So, P(A or B) = 64% + 28% - 22% = 70%.

A Recent Survey of Local Cell Phone Retailers Showed That