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  • 16 children are to be divided into two groups A and B in 10 and 6 children. The average percent marks obtained by the children of Group A is 75 and the average per cent marks of allthe 16 children is 76. What is the average per cent marks of children of G

16 children are to be divided into two groups A and B in 10 and 6 children. The average percent marks obtained by the children of Group A is 75 and the average per cent marks of allthe 16 children is 76. What is the average per cent marks of children of Group B?(5) None of these(1) 78 2/3(2) 77 1 / 3(3) 78 1/3(4) 77 2 / 3?

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eginarrayl extRequired average =dfrac(76 imes 16)-(75 imes 10)6\ \ =dfrac1216-7506\ \ =dfrac4666\ \ =dfrac2333\ \ =77 dfrac23\ endarray

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Deependra Verma

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