document.write( "Question 375368: assume the random variable X has a binomial distribution with the given probability of obtaining a success find the following probability, given the sample size rounded your answer to 3 decimal places
\n" ); document.write( "P(x> or =3)n=4, p=0.5 \n" ); document.write( "

Algebra.Com's Answer #266939 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi,
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document.write( "Note: The probability of x successes in n trials is: \r
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document.write( "P = nCx*  where p and q are the probabilities of success and failure respectively. 
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document.write( "In this case p & q are = 1/2 or .5
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document.write( "nCx =   4C3 = 4    4C4 = 1
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document.write( "P(x≥3)= P(3) + P(4) 
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document.write( "P(3)=  4*(.5)^3(.5) = .25 
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document.write( "P(4)= .5^4 = .0625 
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document.write( "P(x≥3)= .25 + .0625 = .3125
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