# drawing 2 coins at random w/out rep- does that mean together or after another?

• Sep 20th 2009, 11:17 AM
SydneyBristow
drawing 2 coins at random w/out rep- does that mean together or after another?
this is probably a stupid question but when it says

"We draw 2 coins at random (without replacement)" (we have 29 coins)

Does that mean you reach in and pull out 2 at the same time

Or does it mean you take 1 - P 1/29
and then you take another one with P 1/28

What is the proper way to understand this wording?

And if it is take one and then another one do I add or multiply those probabilities to get the probability of drawing 2 at random
• Sep 20th 2009, 11:20 AM
Matt Westwood
Taking two out at the same time is tantamount to the same thing as taking one then taking another one, but in that case you can't tell which one is "first".
• Sep 20th 2009, 07:24 PM
jfz23
I believe it means take one out, then take out another. So the sample space for choosing the second coin has one less coin to choose from.