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?(adsbygoogle = window.adsbygoogle || []).push({});

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

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Stack of 6 cards probability

**Physics Forums | Science Articles, Homework Help, Discussion**