# 9 coins 9 heads probability

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• Apr 17th 2010, 04:43 PM
dwsmith
9 coins 9 heads probability
p[of tossing nine coins and getting all heads] = $nCr*p^n*q^{n-r}=9C9*.5^9=.001953125$

Is this correct?
• Apr 17th 2010, 04:48 PM
TKHunny
If they are fair coins, you have it.