There are 4 kids A, B, C and D. There are 10 red balls, 20 green balls, and 30 blue balls to distribute among A, B, C and D such that A receives only red and green balls, B receives only green and blue balls, C receives only red and green balls and D receives only red and blue balls. What is the average number of balls received by a kid?
Here is my approach:
A, C and D get 3 red balls on average.
A, B and C get 6 green balls on average.
B and D get 15 blue balls on average.
A gets total of 9 balls B gets total of 21 balls C gets total of 9 balls D gets total of 18 balls
So, each kid gets (9+21+9+18)/4 = 14.25.
If my approach is correct?