Asked by Tracy

Assume that event A occurs with probability 0.4 and event B occurs with probability 0.5. Assume that A and B are disjoint events.

The probability that either event occurs (A or B) is

A. 0.0
B. 0.7
C. 0.9
D. 1.0.
Answered by Damon
easy to say they do not happen
1-pA = .6
1-pB = .5
so probability that neither happens is
.3
so probability that at least one happens is 1-.3 = .7
Answered by Tracy
Damon, thank you!
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