document.write( "Question 876252: Costumers in a department store are normally distributed with a mean age of 32.3 years and a standard deviation of 9.7 years.\r
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Algebra.Com's Answer #528657 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi
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document.write( "Population: mean age of 32.3 years and a standard deviation of 9.7 years.
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document.write( "P(20 ≤ x ≤ 29  ) = P( -1.268 ≤  z  ≤  -.340)
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document.write( "                 = P( z ≤  -.340) -P(z  ≤ -1.268)
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document.write( "                 = .3669 - .1024 = .2645 
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document.write( "n = 3
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document.write( "b) P(2) = 3C2(.2645)^2(.7355)^1 \n" );
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