The scores, X, of an examination may be assumed to be normally distributed with μ = 70 and σ2 = 49. What is the probability that:
(a) A score chosen at random will be between 80 and 85?
(b) A score will be greater than 75?
(c) A score will be less than 90?
(d) Interpret the meaning of (a), (b), and (c).