Consider the example of finding the probability of selecting a black card or a 6 from a deck of 52 cards.

The probability of selecting a black card or a 6 = 7/13

Step-by-step explanation:

In this question we have given two events. When two events can not occur at the same time, it is known as mutually exclusive event.

According to the question we need to find out the probability of black card or 6. So we can write it as:

P (black card or 6):

The probability of selecting a black card = 26/52

The probability of selecting a 6 = 4/52

And the probability of selecting both = 2/52.

So we will apply the formula of compound probability:

P (black card or 6) = P (black card) + P (6) - P (black card and 6)

Now substitute the values:

P (black card or 6) = 26/52+4/52-2/52

P (black card or 6) = 26+4-2/52

P (black card or 6) = 30-2/52

P (black card or 6) = 28/52

P (black card or 6) = 7/13.

Hence the probability of selecting a black card or a 6 = 7/13 ...