Question: Records suggest that the normal distribution with mean 50 and standard deviation 9 is a plausible model for a measurement of the amount of suspended

Records suggest that the normal distribution with mean 50 and standard deviation 9 is a plausible model for a measurement of the amount of suspended solids (ppm) in river water. Find
(a) P[X < 46.4]
(b) P[X < 57.2]
(c) P[X > 57.2]
(d) P[X > 60.8]
(e) P[33.8 < X < 64.4]
(f) P[52.5 < X < 60.9]

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