Curious Nature Of Children

What would be the nature of children if a colour blind woman marries a normal man :-

Thought patterns of children are

In a colony 5 families have 1 child, 7 families have 2 children, 8 families have 3 children and 3 families have 4 children. What is the mode of the number of children.

16 children are to be divided into two groups A and B consisting 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 ?