assuming iron levels in a solution is evenly distributed with mean of 60g/l and a standard deviation of 6g/l. let x denote the amount of iron in g/l in this solution then x ~ N(60, 6 sqd) calculate the following probabilities

p(x<66)

p(x<68)

p(x>50)

p(50<x<70)

construct a symetric range around mean of x such that 95% of reading taken off this solution will have iron levels in this range