The given bar graph shows the result of $10^{t h}$ class students of a school for $4$ years. Study the graph and answer the questions.
What is the ratio of the average number of students getting I class to the average number of students getting III class over the year?

4 : 21

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21 : 4

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4 : 13

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12 : 1

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Solution

The correct option is B $21 : 4$
Average number of students getting class I
$= \frac{90 + 90 + 120 + 120}{4} = \frac{180 + 240}{4} = \frac{420}{4} = 105$
Average number of students getting class III
$= \frac{20 + 30 + 20 + 10}{4} = \frac{80}{4} = 20$
Required ratio $= 105 : 20 = 21 : 4$ .

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The given bar graph shows the result of 10th class students of a school for 4 years. Study the graph and answer the questions.What is the ratio of the average number of students getting I class to the average number of students getting III class over the year?

The correct option is B 21:4Average number of students getting class I=90+90+120+1204=180+2404=4204=105Average number of students getting class III=20+30+20+104=804=20Required ratio =105:20=21:4.

The given bar graph shows the result of $10^{t h}$ class students of a school for $4$ years. Study the graph and answer the questions.
What is the ratio of the average number of students getting I class to the average number of students getting III class over the year?

The correct option is B $21 : 4$
Average number of students getting class I
$= \frac{90 + 90 + 120 + 120}{4} = \frac{180 + 240}{4} = \frac{420}{4} = 105$
Average number of students getting class III
$= \frac{20 + 30 + 20 + 10}{4} = \frac{80}{4} = 20$
Required ratio $= 105 : 20 = 21 : 4$ .