: 14:36. The average test marks in a particular class is 79. The standard deviation is 5. If the marks áre distributed normally, how many students in a class of 200 did not receive marks between 75 and 82? Given: Pr {0

A First Course in Probability (10th Edition)
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Chapter1: Combinatorial Analysis
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: 14:36. The average test marks in a particular class is 79. The standard deviation is 5. If the
marks åre distributed normally, how many students in a class of 200 did not receive marks between 75 and
82? Given :
Pr {0 <ZS-7} = -2580,
Pr {0 sZS 6} = 2257,
Pr (0<Z< 8}
= 2881
where Z is a standard normal variable.
Transcribed Image Text:: 14:36. The average test marks in a particular class is 79. The standard deviation is 5. If the marks åre distributed normally, how many students in a class of 200 did not receive marks between 75 and 82? Given : Pr {0 <ZS-7} = -2580, Pr {0 sZS 6} = 2257, Pr (0<Z< 8} = 2881 where Z is a standard normal variable.
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