document.write( "Question 874729: The time required to finish a test in normally distributed with a mean of 40 minutes and a standard deviation of 8 minutes. What is the probability that a student chosen at random will finish the test between 24 & 48 minutes ?
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document.write( "A.82%
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document.write( "B.2%
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document.write( "C.84%
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document.write( "D.16%
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Algebra.Com's Answer #527760 by ewatrrr(24785)![]() ![]() You can put this solution on YOUR website! P( 24 < x < 48) = P(z <1) - P(z < -2) = .84 - .02 = .82 0r 82% \n" ); document.write( " |