SOLUTION: A coin is tossed 3 times. What is the probability of obtaining at least 1 head?

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Question 454457: A coin is tossed 3 times. What is the probability of obtaining at least 1 head?
Found 2 solutions by richwmiller, stanbon:
Answer by richwmiller(17219) About Me  (Show Source):
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
A coin is tossed 3 times. What is the probability of obtaining at least 1 head?
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P(at least one head) = 1 - P(no heads in 3 tosses)
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= 1 - (1/2)^3
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= 1 - 1/8
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= 7/8
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Cheers,
Stan H.
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