SOLUTION: If a fair coin is tossed 3 times, what is the probability of getting at least 2 heads (at least 2 heads" means 2 or more heads)?

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Question 289851: If a fair coin is tossed 3 times, what is the probability of getting at least 2 heads (at least 2 heads" means 2 or more heads)?

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
If a fair coin is tossed 3 times, what is the probability of getting at least 2 heads
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P(2<= x <=3) = P(x=2) + P(x=3)
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= 3C2(1/2)^2(1/2) + 3C3(1/2)^3*(1/2)^0
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= 3/8 + 1/8
= 4/8
= 1/2
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Cheers,
Stan H.