the amount of pyridoxine in grams per multiple vitamin is normally distributed with mean = 110 grams and standard deviation = 25 grams. What is the probability that a randomly selected vitamin will contain between 100 and 110 grams of pyridoxine?

Answer 1

(100-110)/25 = z = -.4

(110-110)/25 = z = 0

you want to find the probability between -.4 and 0

you can look this up using a z-table or a calculator.

I go .155 See if you agree.