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gmatter2012
- Master | Next Rank: 500 Posts
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When a random experiment is conducted, the probability that event A occurs is 0.3. If the random experiment is conducted 5 independent times, what is the probability that event A occurs exactly twice?
A.5/243
B.25/243
C.64/243
D.80/243
E.16/27
I think this should be
[.3 * .3 * .7 * .7 * .7 ] * 5!/ 3! 2!=
.03087 * 10 = .3087 how ever this does not match any given options
A.5/243
B.25/243
C.64/243
D.80/243
E.16/27
I think this should be
[.3 * .3 * .7 * .7 * .7 ] * 5!/ 3! 2!=
.03087 * 10 = .3087 how ever this does not match any given options
