The probability of two events that are not mutually exclusive may be calculated using the formula . in other words, the probability of or occurring is the sum of the probabilities, minus the probability that and occurred. using this formula, calculate the probability of drawing a black card or any ten on a single random draw from a standard 52-card deck.

The steps in solving for the problem is already described above. The probability of choosing a black out of a 52-card deck is equal to 1/2 because there are 26 black cards and 26 red cards. 

The probability of picking 10 out of the 52-card deck is equal to 4/52 which can be simplified to 1/13. There are two 10 card that is black making the probability equal to 2/52 or 1/26. From the described steps, the answer would be,
                                 P = (1/2) + (1/13) - (1/26)
                                     P = 7/13