document.write( "Question 1038149: In the study of fingerprints, an important quantitative characteristic is the total ridge count for 10 fingers of an individual. Suppose that the total ridge counts of individuals in a certain population are approximately normally distributed with a mean of 140 and a standard deviation of 50. Find the probability that an individual picked at random from this population will have a ridge count of between 100 and 200.\r
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document.write( "A) .8849
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document.write( "B) .6730
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document.write( "C) .7881
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document.write( "E) .7875 \n" );
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Algebra.Com's Answer #652876 by Boreal(15235)![]() ![]() You can put this solution on YOUR website! for 100, z is (100-140)/50=-4/5 \n" ); document.write( "for 200, z is (200-140)/50=6/5 \n" ); document.write( "the probability of something between z of -0.8 and z of 1.2 is 0.6730 B. \n" ); document.write( " |