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The ratio of the total number of boys passed to the...

This question belongs to Data Interpretation Bar Chart
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Directions (1 - 4): The bar graph shows the results of an annual examination in a secondary school in a certain year. Answer the following four questions based on this chart.
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The ratio of the total number of boys passed to the total number of girls passed in the three classes VII, VIII and IX is:

Answer & Solution
Correct Answer: Option C
$$\eqalign{ & \text{Required ratio} \cr & = \frac{40 + 90 + 70}{100 + 50 + 80} \cr & = \frac{200}{230} \cr & = \frac{20}{23} \cr & = 20 : 23 \cr} $$
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