Kenneth S. answered 12/15/16
Tutor
4.8
(62)
Expert Help in Algebra/Trig/(Pre)calculus to Guarantee Success in 2018
I'll make use of the Standard Normal Distribution Table.
First, the area under the curve from left to right, up to 215 pounds, corresponds to z-score 3 because z = (215-200)/5.
That number is 0.99865 and you must subtract 0.50000 from that (area from left up to the mean, z =0) and so your answer is 0.49865