What is the ratio of the number of boys in school C, the number of girls in school B and the total number of students in school E?

45:7:97

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43:9:97

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45:7:87

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43:9:87

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None of these

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Solution

The correct option is C
45:7:87

No. of girls in School B $= \frac{6000 \times 9}{1000} - 400 = 540 - 400 = 140$

No. of students in School E $= \frac{6000 \times 29}{1000} = 1740$

$∴$ Required ratio $= 900 : 140 : 1740 = 45 : 7 : 87$

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