PLEASE ANSWER ASAP

Question

A random survey was conducted to determine the cost of residential gas heat. Analysis of the survey results indicated that the mean monthly cost of gas was $125, with standard deviation of $10.

if the distribution is mound-shaped and symmetric, what percent of homes will have a monthly bill more than $125?

(A) 34%

(B) 50%

(C) 68%

(D) 84%

(E) 97.5%

Show work please thank you

Answer 1

If the mean is 125, that means that 1/2 of the values were higher than 125 and 1/2 were lower