If the probability is .90 that a student taking this class is a Psychology major, and the probability that a student in this class has red hair is .05, then the joint probability of being a Psychology major and a red head in this class is .95.

Question

Quizplus · Accepted Answer

The joint probability of being a Psychology major and a red head cannot be .95 if the independent probabilities of being a Psychology major and having red hair are .90 and .05, respectively. The joint probability should be obtained by multiplying the two independent probabilities, which would give a result of .045.

If the Probability Is