Mathematics, 27.05.2021 19:20, davidoj13

(9) Examination scores are normally distributed with mean u = 60 and standard deviation o = 15.
(a) Determine the probability of a score exceeding 85
(b) Determine the probability of a score below 55.
Determine the pass mark, if the probability of passing is 0.9.

(9) Examination scores are normally distributed with mean u = 60 and

standard deviation o = 15.
(

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(9) Examination scores are normally distributed with mean u = 60 and standard deviation o = 15.