There are 15 red marbles, 45 green marbles and 3 purple marbles in a basket. There is a blind man. What is the minimum number of marbles that the blind man has to pick to make sure that he picked at least 2 marbles of different colors?

46 marbles is the minimum number of marbles

Step-by-step explanation:

Firstly, if it results that he went on picking 45 times on a stretch, it is possible that he picks all as green marbles

However, on the 46th pick, it is sure that he would have exhausted all the green marbles and picked another marble type

Hence, what we are saying is that by his 46th pick, it is sure that he would have picked a second marble type

; )

step-by-step explanation: ; )