# Selecting balls from a bag.

• Dec 9th 2011, 12:43 AM
someoneawesome
Selecting balls from a bag.
i have a bag of 6 black balls and 14 white balls. What is the probability of getting 3 black balls out?
• Dec 9th 2011, 01:36 AM
chisigma
Re: probability help
An important data is missing: how many balls do You get out in total?...

Kind regards

$\chi$ $\sigma$
• Dec 9th 2011, 02:45 AM
Plato
Re: probability help
Quote:

Originally Posted by chisigma
An important data is missing: how many balls do You get out in total?...

I addition to the above, we must know how the balls are drawn.
Is it with replacement or without replacement?