The multiplication rule states that the probability of two or more independent events occurring together is calculated by multiplying their independent probabilities. The addition rule states that the probability that any one of two or more mutually exclusive events occurring is calculated by adding their probabilities.
-If the probability of being blood-type A is 1/8 and the probability of blood-type O is 1/2, what is the probability of being either blood-type A or blood-type O?
A) 5/8
B) 1/2
C) 1/8
D) 1/16

Question

Quizplus · Accepted Answer

The events are mutually exclusive, so we use the addition rule: 1/8 + 1/2 = 5/8.

The Multiplication Rule States That the Probability of Two or More