Applicants for a job had to complete a mathematics test. The time they took to
complete the test is normally distributed with a mean of 53 minutes and a
standard deviation of 16.3. One of the applicants is chosen at random.
Find the probability that this applicant took at least 40 minutes to
complete the test.

2b.
For 11% of the applicants it took longer than minutes to complete the test.
Find the value of .

k

k

2c.
There were 400 applicants for the job.
Estimate the number of applicants who completed the test in less than
25 minutes.