An easy Puzzle?

[sinjun]

Will had a deep, dark-sided jar. The jar contained 30 jelly beans in 5 colors, an equal number of each color. Will could only reach one jelly bean at a time.

How many jelly beans would he have to pull out before he was sure he got two of the same color?

Comments

[insaint.livejournal.com]

Six. In the worst case, the first five you pull will be of different colours. Then the next one is guaranteed to match one of the others.

[damara.livejournal.com]

*grins*

Yeah. Good job!

[insaint.livejournal.com]

Thanks. :)

Now post something harder?

[damara.livejournal.com]

*laughs*

I'll think about it. ;)

[wibbble]

As a maths/stats problem, the answer is six, like Alery said. But in reality, all he needs is a decent light and to actually look what he's picking up and he can get it in two. ;o)

Or you could cheat, and 'pull' out zero beans: just pour all 30 onto the table!