The amount of pyridoxine in grams in a multiple vitamin is n

The amount of pyridoxine (in grams) in a 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 at least 100 grams of pyridoxine? 0.5478 0.6554 0.4673 0.7589

Solution

= 110

= 25

P(x > 100) = P((x-)/ > (100-110)/25) = P(z > -.4) = .6554