- #1
UrbanXrisis
- 1,196
- 1
In a stack of 6 cards, each card is labled with a different integer 0 through 5. If two cards are selected at random without replacement, what is the probability that their sum will be 3?
here's what I did... 0 1 2 3 4 5
to get either a 0,1,2, or 3 there is a 4/6 chance
after, there is a 1/5 chance to the the card that will add up to 3.
so...is the answer (4/6+1/5)=13/15?
I know that it's wrong but I'm not sure how to solve it
thanks,
Urban
here's what I did... 0 1 2 3 4 5
to get either a 0,1,2, or 3 there is a 4/6 chance
after, there is a 1/5 chance to the the card that will add up to 3.
so...is the answer (4/6+1/5)=13/15?
I know that it's wrong but I'm not sure how to solve it
thanks,
Urban