A bag contains several blue discs and several yellow discs. Find the smallest number of discs which should be taken out of the bag in order to ensure that at least three of those removed are of the same color.

Question

experimentx · Answer

what is the probability of getting yellow disc or blue disc??

anonymous · Answer

50%?

experimentx · Answer

with what percent of certainty??

anonymous · Answer

I don't know. If I had any idea of how to do this, I'd never have posted it here. :(

experimentx · Answer

If you take out disc 5 times, there is exactly 50% change that you will have 3 yellow or 3 blue disc.
Even if you take out 100 disc ... there is not 100% change ...(but close to 100%)
at infinite number of draws there's 100% change

I am not sure though!!

experimentx · Answer

typo *change => chance

experimentx · Answer

http://www.wolframalpha.com/input/?i=%285+choose+3%290.5%5E5%2B%285+choose+4%290.5%5E5+%2B+0.5%5E5

anonymous · Answer

BYBYB
YBYBY

atleast 5.

anonymous · Answer

i was trying to over think this...

anonymous · Answer

http://www.khanacademy.org/math/probability/v/simple-probability |dw:1338628948525:dw|