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The number of persons having either blood group A or blood...

This question belongs to Data Interpretation Pie Chart
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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.
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The number of persons having either blood group ‘A’ or blood group ‘B’ is:

Answer & Solution
Correct Answer: Option A
Person having blood group A or B
$$\eqalign{ & = \frac{129.6° + 72°}{360}\times150 \cr & = 84 \cr} $$
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