check my answers!? central limit theorem

Question

jessicawade · Answer

The Boeing 757-200 ER airliner carries 200 passengers and has doors with a height of 72 inches. Heights of men are normally distributed with a mean of 69.0 inches and a standard deviation of 2.8 inches. If half of the 200 passengers are men, find the probability that the mean height of the 100 men is less than 72 inches.

    A.	

    0.9999
    B.	

    0.0001
    C.	

    0.8577
    D.	

    0.1432

jessicawade · Answer

i got c

jessicawade · Answer

i worked it out and solved it, my teacher told me how but it says its wrong, what am i not doing?