1. A person's level of blood glucose and diabetes are closely related. Let x be a random variable
measured in milligrams of glucose per deciliter (1/10 of a liter) of blood. Suppose that after a 12-
hour fast, the random variable x will have a distribution that is approximately normal with mean
μ=73 and standard deviation of σ = 20. What is the probability that, for an adult after a 12-hour
fast, x is more than 85?
a. 0.113
b. 0.363
c. 0.226
d. 0.726
e. 0.274
