Question

There is a bag containing 16 green marbles, 14 blue marbles and 13 red marbles.what is the least amount of marbles that i must pick out to be sure that i got 3 different colours?

Answer 1

31

Explanation:

In order to guarantee that you get 3 colors, you much choose a number that exceeds the number of marbles of the most prevalent 2 colors.

That is, you could choose 30 marbles and only end up with 16 green and 14 blue. To guarantee that you also choose a red, you must choose 31 marbles.