document.write( "Question 852124: If the probability of a tennis player serving an ace is 1/6, what's the probability that the player will serve 3 aces out of 8 serves?\r
\n" ); document.write( "\n" ); document.write( "I know it's independent probability. I did it like this:
\n" ); document.write( "for \"non-ace\" results, the prob. is 5/6
\n" ); document.write( "for 8 serves, the prob of 3 aces is:\r
\n" ); document.write( "\n" ); document.write( "1/6 * 1/6 * 1/6 * 5/6 * 5/6 * 5/6 * 5/6 * 5/6 = 3125/1,679,616 = approx. 0.00186, or 0.186%, or 186/1000.\r
\n" ); document.write( "\n" ); document.write( "Am I even close? \n" ); document.write( "

Algebra.Com's Answer #513164 by ewatrrr(24785) $\"\"$ $\"About$

You can put this solution on YOUR website!

 
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document.write( "Hi,
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document.write( "Note: The probability of x successes in n trials is: 
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document.write( "P (x)=   where p and q are the probabilities of success and failure respectively. 
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document.write( "In this case p = 1/6 & q = 5/6  n = 8
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document.write( " =  
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document.write( "P(x=3) =  You had just not used the 'combination factor' of 56
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