You can put this solution on YOUR website! What is the probability of tossing a coin and getting a tails? 50:50... or 1/2.
Let's assign some of these events a name. Let's call event A the probability that coin 1 will be tails. Let's call event B the probability that coin 2 will be tails. C follows as coin 3.
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So what is the probability of P(A and B and C) is what we are asking.
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By definition P(A and B and C) = P(A) * P(B) * P(C).
Each event is a 1/2 probability so:
P(A and B and C) =
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She has a 1/8 chance.
