Three people are selected at random from four females and eight
males. Find the probability of the following. (Round your answers
to three decimal places.)
(a) At least one is a male.
The complement event is the event that 3 females are selected.
P(complement event) =
(4 females CHOOSE 3)/(12 people CHOOSE 3) = C(4,3)/C(12,3) = ____?
1 - P(complement event) = 1 - ____ = ____?
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(b) At most two are male.
The complement event is the event that 3 males are selected.
P(complement event) =
(8 males CHOOSE 3)/(12 people CHOOSE 3) = C(8,3)/C(12,3) = ____?
1 - P(complement event) = 1 - ____ = ____?
Edwin
