Assume That the Weight Loss for the First Month of a Diet

Assume that the weight loss for the first month of a diet program varies between 6 pounds and 12 pounds, and is spread evenly over the range of possibilities, so that there is a uniform distribution. Find the probability of the given range of pounds lost.
-Between 7 pounds and 10 pounds

A) $\frac { 2 } { 3 }$

B) $\frac { 1 } { 3 }$

C) $\frac { 1 } { 4 }$

D) $\frac { 1 } { 2 }$