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TOSS 2 PENNIES 20 TIMES. WHAT IS THE PROBABLITY OF GETTING 2 HEADS
17 years ago

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PsyDAG
The probability of getting both heads with two coins is 1/4 — HH, TT, TH, HT. The probability of getting 2 heads with either-or aspects is determined by adding the independent, individual probabilities. Thus you would expect to get two heads 5 times in 20 tries.

I hope this helps. Thanks for asking.

17 years ago

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