## December 11, 2008

### Permutation & Combination

A bag Contains 5 black balls, 10 red balls and
12 white balls...Atmost in how many draws you
could get a pair....?

Ruchi said...

Since there are three colors, fourth draw will definitely get a pair.

same as the above commenter

Anonymous said...

no wrong if u were really unlucky you could need 13!

Secret Squïrrel said...

Er...no. After picking out one black, one blue, and one red ball, the next ball drawn out must match one of them. So, 4 draws is correct.

Terminator said...

No. What if all the 3 draws comes out as same color? it would need 13...

Secret Squïrrel said...

@Terminator - If you draw 3 balls out that are the same colour then you already had a pair after the second draw!

Anonymous said...

HAHAHA who said the two balls have the same color? you take any two and you have a pair

Anonymous said...

HAHAHA who said the two balls have the same color? you take any two and you have a pair

vinoo said...

i think question is framed wrongly which is making it dead easy...how about if i reframe: A bag Contains 5 black balls, 10 red balls and
12 white balls...Atmost in how many draws you
could get a pair of same color consecutively....?