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16 children are to be divided into tw...

16 children are to be divided into two groups `A` and `B` of 10 and 6 children. The average percent marks obtained by the children of group `A` is 75 and the average percent marks of all the 16 children is 76. What is the average percent marks of children of group `B` ? `77 1/3` (b) `77 2/3` (c) `78 1/3` (d) `78 2/3`

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