Card type problem, 3 draws
I read the sticky and watched some videos and learned a bit about some basic statistics concepts.
I am struggling with the following problem:
You have a stack of 10 cards.
7 are black 3 are red
If you draw 3 cards from the same pool of 10, what is the probability that at least 1 will be red?
Thanks for any help.
Re: Card type problem, 3 draws
Quote:
Originally Posted by
hardwarefailure
You have a stack of 10 cards.
7 are black 3 are red
If you draw 3 cards from the same pool of 10, what is the probability that at least 1 will be red?
It is 1 minus the probability that none of the three is red.
Re: Card type problem, 3 draws
Quote:
Originally Posted by
Plato
It is 1 minus the probability that none of the three is red.
And what is the probability that none of the 3 are red?
Is that (7/10)*(6/9)*(5/7)?
If so the probability of said problem is .666 or 2/3?
Thanks again.