SOLUTION: What is the probability of obtaining at least one head in seven flips of a coin?

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Question 1032175: What is the probability of obtaining at least one head in seven flips of a coin?
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
Probability of obtaining at least one head in seven flips of a coin = 1 - Probability of obtaining no heads in 7 flips of a coin.
Assume the coin is fair.
==> probability is 1+-+%281%2F2%29%5E7+=+127%2F128