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MP Police Constable 20-Aug-2017 Shift 1 Solved Paper

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Question : 56

Total: 100

A class has 20 boys and 20 girls. The average age of girls in the class is 16 years and the average age of boys in the class is 17 years. One girl and one boy leave the class and the average age of the girls reduced by 1 year and that of boys reduced by 2 years. Find the new average age of the whole class.

15 years
22 years
10.5 years
20 years

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