> 1 - pnorm(22,20.6,5.5) [1] 0.3995Thus, about 40% of the students passed the exam. How many more would be expected to fail if the mark were moved? We multiply the probability times the sample size to get
> 1000000 * diff(pnorm(c(22,23), mean=20.6, sd=5.5)) [1] 68251