Sock-ability

Topic: Probability

Difficulty: 3/10

 

 

 

Hint in 3…..

 

2………

 

1………

 

You only need  2  socks of the same color.

 

 

Solution in 3…..

 

2………

 

1………

 

 

FULL SOLUTION

Step 1: There are a total of 3 different colors, which means that there must be at least 2 socks of the same color if you pick 4 socks.

Step 2: It is guaranteed that you will have a matching pair (100% chance)