document.write( "Question 437292: Assume that the probability is .5 that a child is born a boy and births are independent. What is the probability that if a family will have 4 children (no twins) they will all be boys? \n" ); document.write( "
Algebra.Com's Answer #302518 by ewatrrr(24785)\"\" \"About 
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\n" ); document.write( "Hi
\n" ); document.write( "Note: The probability of x successes in n trials is:
\n" ); document.write( "P = nCx* \"p%5Ex%2Aq%5E%28n-x%29\" where p and q are the probabilities of success and failure respectively.
\n" ); document.write( "In this case p & q are = 1/2 or .5
\n" ); document.write( "nCx = \"n%21%2F%28x%21%28n-x%29%21%29\"\r
\n" ); document.write( "\n" ); document.write( "P(family/four children, will have 4 boys) = (.5)^4 \n" ); document.write( "
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