The following bar chart shows the no. of college students enrolled in two summer camps A and B from 2015 to 2020.

Blank Bars = A

Line Bars  = B

What is the ratio of students enrolled in camp B in 2019 to the average of students enrolled in camp A in 2016, 2017 and 2018?

15 : 11

No. of students in camp B in 2019 = 200

Total no. of students in camp A in 2016, 2017 and 2018 = 80 + 140 + 220 = 440

Average = \(\frac{440}{3}\)

Ratio → 200   :  \(\frac{440}{3}\)

            600   :   440

              30   :   22

              15   :   11