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 in 76. What is the percent marks of children of group B ?
Required average = `((76 xx 16) - (76 xx 10))/(6)` = `((1216 - 750)/(6))` = `466/6` = `233/3` = `77 2/3`
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