Neha has 4 yellow t-shirts, 6 black t-shirts, and 2 blue t-shirts to choose from for her outfit today. She chooses a t-shirt randomly with each t-shirt equally likely to be chosen. Find the probability that a black or blue t-shirt is chosen for the outfit.
(a) \(\frac{8}{13}\)
(b) \(\frac{5}{6}\)
(c) \(\frac{1}{2}\)
(d) \(\frac{7}{12}\)
I have been asked this question in unit test.
My question is taken from Addition Theorem on Probability in division Discrete Probability of Discrete Mathematics