The given pie-chart shows the data on A, B, O, and AB blood groups of 240 donors. Study the chart and answer the question that follows.
What is the ratio of the average donors of blood groups ‘A’, ‘O’, and ‘AB’ to the donors of blood group ‘B’?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 2 : 3
Total angle covered by blood groups 'A', 'O', and 'AB' = 90° + 80° + 70° = 240°
Total donors of blood groups 'A', 'O', and 'AB' = (240/360) × 240 = 160
Average donors of blood groups 'A', 'O', and 'AB' = 160/3
Total donors of blood group 'B' = 240 - 160 = 80
Required ratio = (160/3) : 80 = 2 : 3
Therefore, the ratio of the average donors of blood groups ‘A’, ‘O’, and ‘AB’ to the donors of ‘B’ is 2 : 3.