Asked by Anonymous
an unbiased coin is tossed 3 times. find the probability that the coin lands heads exactly once.
Answers
Answered by
PsyDAG
n = # of things to choose from and r = # that you choose.
5! = 5 factorial = 5*4*3*2*1 = 120
nCr = n!/r!(n-r)!
5! = 5 factorial = 5*4*3*2*1 = 120
nCr = n!/r!(n-r)!
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