document.write( "Question 1204802: Suppose I have an unfair coin, it lands on heads 75% of the time. If I flip this coin four times, what is the probability that I will get 2 heads? What is the mean for number of heads? Variance? Standard deviation? \n" ); document.write( "

Algebra.Com's Answer #841306 by Edwin McCravy(20055) $\"\"$ $\"About$

You can put this solution on YOUR website!

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document.write( "Binomial probability, with \r\n" );
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document.write( "n = number of trials = 4 \r\n" );
document.write( "p = probability of getting a success on 1 trial = 0.75\r\n" );
document.write( "x = exact number of successes to get the probability of getting out of n trials.  \r\n" );
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document.write( "What is the mean for number of heads? Variance? Standard deviation?\r\n" );
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document.write( "Mean = \r\n" );
document.write( "Variance = \r\n" );
document.write( "Standard deviation = \r\n" );
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document.write( "You can plug in those formula as well as I can. You may have software to do\r\n" );
document.write( "all this for you if you learn what's what.\r\n" );
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document.write( "Edwin

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