document.write( "Question 437694: the marks of 60 students in an sta 122 examination are normally distributed with a mean of 58 and a standard deviation of 18.what are the chances that an individual student, chosen at random, will have a mark greater than 70? \n" ); document.write( "

Algebra.Com's Answer #302837 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi
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document.write( "*Note: 
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document.write( "mean of 58 and a standard deviation of 18.  P(x >70)
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document.write( "  z = (70-58)/18 = 12/18 = .6667
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document.write( " P( z > .6667) = 1 - .7475 = .2525
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