CK-12-Basic Probability and Statistics Concepts - A Full Course

1.4. Mutually Exclusive Events http://www.ck12.org

The probability of picking a number from 1 to 10 that is even and picking a number from 1 to 10 that is odd would
just be 0, since these are mutually exclusive events. In other words,P(AandB) =0.

Example B

2 fair dice are rolled. What is the probability of getting a sum less than 7 or a sum equal to 10?

P(A) =probability of obtaining a sum less than 7

P(A) =

15

36

P(B) =probability of obtaining a sum equal to 10

P(B) =

3

36

There are no elements that are common, so the events are mutually exclusive.