Weights of newborn babies in a certain state have normal distribution with mean 7.50lb and standard deviation 1.25lb. A newborn weighing less than 6lb is considered to be at-risk, that is, has a higher mortality rate.
A baby just born in this state is picked at random. The probability that the baby is at-risk is about
(a) 0.885
(b) 0.933
(c) 0.115
(d) 0.067
(e) 0.05