Question

When Camila goes bowling, her scores are normally distributed with a mean of 150 and a standard deviation of 12. What percentage of the games that Camila bowls does she score less than 137, to the nearest tenth?

Answer 1

z = (137 − 150)/12 = −13/12 ≈ −1.0833.
Using the standard normal table or calculator, P(Z < −1.0833) ≈ 0.1394.

So about 13.9% of her games are below 137 (to the nearest tenth).