The probability of two events that are not mutually exclusive may be calculated using the formula p(aub) = p(4) + p(b) - p(a b). in other words, the probability of a or b occurring is the sum of the probabilities, minus the probability that a and b occurred.

using this formula, calculate the probability of drawing a black card or any 2, 3, 4, or 5 on a single random draw from a standard
52-card deck

a. 1/2
b. 17/26
c. 19/26
d. 21/26