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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.

  • Stats -

    easy to say they do not happen
    1-pA = .6
    1-pB = .5
    so probability that neither happens is
    so probability that at least one happens is 1-.3 = .7

  • Stats -

    Damon, thank you!

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