I can't answer this exam question! Please help me:

Question

Jodie and Karen play a game with a pack of 40 numbered cards.
There are four cards with each number from 0 to 9.

Jodie picks a card and keeps it.
Karen then picks a card.

What is the probability that they both pick a number 5?

I believe the answer is (4/40)*(3/39) = .0077

To help your understanding of the process, here is the reasoning.

There are four 5s in the 40 cards, so the likelihood of picking a 5 is 4/40.

With a five already picked (since it is not replaced), there are only three 5s left out of the remaining 39 cards, giving you a probability of 3/39.

The probability of both (all) events occurring is obtained by multiplying the probabilities of the individual events.

I hope this helps a little more. Thanks for asking.

Thank you.