Directions (1 - 4): This is a pie chart for the data on A, B, O, AB blood groups of 150 donors. Observe the pie chart and answer the questions.
1. The ratio of donors blood group ‘A’ to the average of the donors group ‘O’, ‘B’ and ‘AB’ is: A. 4 : 3 B. 4 : 5 C. 5 : 4 D. 3 : 4 Answer & Solution Discuss in Board Answer & Solution Answer: Option D Solution: Average of O, B, AB blood group $$\eqalign{ & = \frac{100.8° + 129.6° + 57.6°}{3} \cr & = \frac{288°}{3} \cr & = 96° \cr & \therefore \text{Required ratio} \cr & = 72° : 96° \cr & = 3 : 4 \cr} $$
2. The number of persons having either blood group ‘A’ or blood group ‘B’ is: A. 84 B. 96 C. 78 D. 54 Answer & Solution Discuss in Board Answer & Solution Answer: Option A Solution: Person having blood group A or B $$\eqalign{ & = \frac{129.6° + 72°}{360}\times150 \cr & = 84 \cr} $$
3. The number of donors having group ‘O’ is: A. 50 B. 42 C. 30 D. 34 Answer & Solution Discuss in Board Answer & Solution Answer: Option B Solution: The number of donor having group O $$\eqalign{ & = \frac{100.8°}{360}\times150 \cr & = 42 \cr} $$
4. What is the percentage of donors having blood group ‘AB’ ? A. 61% B. 26% C. 16% D. 36% Answer & Solution Discuss in Board Answer & Solution Answer: Option C Solution: % of person having blood group AB $$\eqalign{ & = \frac{57.6°}{360°}\times 100 \cr & = 16\% \cr} $$
