SOLUTION: Three coins are tossed.what is the probability of getting(a)all heads,(b)two heads,(c)at least one head(d) at least two heads?
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Question 1083112: Three coins are tossed.what is the probability of getting(a)all heads,(b)two heads,(c)at least one head(d) at least two heads? Answer by natolino_2017(77) (Show Source):
You can put this solution on YOUR website! Every toss is independent:
a) P(all heads) =Working cases/ Total cases = 1/(2*2*2) = 1/8
b) P(Two heads) = P(one tail) = working cases/ total cases = 3/8
c) P(at least one head) = 1 - P(none head) = 1 - P(three tails) = 1 - 1/8 = 7/8.
d) P(at least two heads) = P( two heads or all heads) = 3/8 + 1/8 = 1/2.
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