Answer:
Explanation:
1) because there are 10 total boxes in box 1 and they want 2/5 of them color in 4 boxes to make 4/10 which can reduce to 2/5
2) they say make it unlikey that a blue box will be picked.. so color in one box
3) now don't color any of the boxes.. so no matter which boxes is picked.. there isn't any blue ones. :)