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1. 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.

The number of donors having group ‘O’ is:

A. 50

B. 42

C. 30

D. 34

Solution:

The number of donor having group O

\begin{aligned} = \frac{100.8 °}{360} \times 150 \\ = 42 \end{aligned}

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