16 children are to be divided into two groups A and…

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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 ?

  1. A. $$77\frac{1}{3}$$
  2. B. $$77\frac{2}{3}$$
  3. C. $$78\frac{1}{3}$$
  4. D. $$78\frac{2}{3}$$

Answer: Option B

Here is complete explanation of 16 children are to be divided into two groups A and….

Solution(By ExamCraze Team)

Required average
$$eqalign{ & = frac{{left( {76 times 16} right) - left( {75 times 10} right)}}{6} cr & = left( {frac{{1216 - 750}}{6}} right) cr & = frac{{466}}{6} cr & = frac{{233}}{3} cr & = 77frac{2}{3} cr} $$

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