In a box of 50 markers, 30 markers are either red or black and 20 are missing their caps. If 12 markers are either red or black and are missing their caps, find the probability that a randomly selected marker is red or black or is missing its cap.
A) .76
B) 1
C) .38
D) .24

Question

Quizplus · Accepted Answer

The probability that a marker is red or black or missing its cap is calculated using the formula for the union of two events: P(A or B) = P(A) + P(B) - P(A and B). Here, P(A) = 30/50, P(B) = 20/50, and P(A and B) = 12/50. So, P(A or B) = (30/50) + (20/50) - (12/50) = 38/50 = 0.76.

In a Box of 50 Markers, 30 Markers Are Either