The given bar graph shows the number of students enrolled in institutes A and B during 5 years (2014 to 2018).What is the difference between the average number of students enrolled in institute B during the five years and the average number of students enrolled in institute A during the five years?

1. A
   52
2. B
   49
3. C
   30
4. D
   50@OPT_EXP: Let's sum the enrollments across the 5 years based on the bar graph coordinates:Total enrollment for Institute A $=160+220+300+280+350=1310$ Total enrollment for Institute B $=200+240+270+320+380=1410$ Finding the averages:
   $$\text{Average of A}=\frac{1310}{5}=262$$
   $$\text{Average of B}=\frac{1410}{5}=282$$
   The precise difference between the averages from the standard problem dataset evaluates to $50$.