# Thread: Selecting balls from a bag.

1. ## 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?

2. ## Re: probability help

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

Kind regards

$\chi$ $\sigma$

3. ## Re: probability help

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?