document.write( "Question 1177492: According to the theory of genetics, a certain cross of rat will result in white-black in the ratio of 8:5.?
\n" ); document.write( "a) What is the probability that among 9 such offspring, 5 will be white? (accurate to 4 decimal places)\r
\n" ); document.write( "\n" ); document.write( "b) What is the expected number of black rats from part a)?\r
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Algebra.Com's Answer #806526 by ewatrrr(24785)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "Hi\r\n" );
document.write( "Binomial Distribution:\r\n" );
document.write( "TI syntax for P(x-value) is binompdf(n, p, x-value).\r\n" );
document.write( " white-black in the ratio of 8:5 ...p(W) = 8/13  and q(B) = 5/13\r\n" );
document.write( "9 off spring\r\n" );
document.write( "a) P(x = 5W) = binompdf(9, 8/13, 5) = .2433\r\n" );
document.write( "b) 'expected number' of black rats from part a)  (5/13) * 9 = 3.4615  0r 3\r\n" );
document.write( "Wish You the Best in your Studies.\r\n" );
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