16 children are to be divided into two groups A and B of 10 and 6 children, respectively. The average marks obtained by the children of group A is 75 and that of all the children is 76. Then, the average marks of the children of group B is
1
\(77\frac{1}{3}\)
2
\(77\frac{2}{3}\)
3
\(78\frac{1}{3}\)
4
\(78\frac{2}{3}\)