Question

A drawer contains 12 identical white socks, 18 identical black socks

Answer 1

Answer:

2 brown

Step-by-step explanation:

The only time you can be so sure you've chosen 2 brown socks is when there are no more white socks and black socks. This means that to be 100% sure that you have chosen 2 brown socks you have to choose the 12 white socks and the 18 black socks and only then can you choose 2 brown socks without looking. Therefore, the total number of socks to choose from is:

Total number of socks = 12 white socks + 18 black socks + 2 brown socks

Total number of socks = 32 socks

A total picking of 32 socks is necessary to be sure without looking that 2 brown have already been chosen that way.

Answer 2

Answer:

4 socks

Step-by-step explanation:

Lets see.

If you chose three socks, you might get 1 or white, 1 or black, and 1 of brown.

So if you chose 4, you have to get two socks of the same colour.

Hope this helps plz hit the crown :D