The following bar graph shows the sales (in thousands) of magazines from six branches (A, B, C, D, E and F) of a publishing company during two consecutive years 2021 and 2022.

What percent of the average sales of branches A, B and C in 2022 is the average sales of branches A, C and F in 2021?

Correct option is C

Given:
Sales in 2021,
A = 80, B = 75, C = 95, D = 85, E=75, F=70
Sales in 2022,
A = 105, B = 65, C = 110, D = 95, E = 95, F = 80
Concept Used:
Average =  $$\frac{(Total \ sum \ of \ values)}{(Total \ number \ of \ values)}$$​​
Percentage = $$\frac{(Given \ number)}{(Total \ number)}×100 \%$$​​
Solution:
Average sales of A, B, C in 2022 = $$\frac{(105 + 65+110)}{3} = \frac{280}{3}$$​​
Average sales of A, C, F in 2021 = $$\frac{(80 + 95+70)}{3}=\frac{245}{3}$$​​
Now,
Percentage = $$\frac{(\frac{245}{3})}{(\frac{280}{3})}×100$$%​
= $$\frac{245}{280}×100 \%$$ 

= 87.5%​