About What Percent of the Cockroaches Have Weights Between 76

Multiple Choice

About what percent of the cockroaches have weights between 76 grams and 84 grams?
The weights of cockroaches follow a Normal distribution with mean 80 grams and standard deviation 2 grams. The figure below is the Normal curve for this distribution of weights.

A) 99.7 percent
B) 95 percent
C) 68 percent
D) 47.5 percent
E) 34 percent