• August 8th 2012, 04:46 AM
PennCow
I'm going over stuff for the final, but I can't figure out how they did this...

I tried hypergeometric distribution, but my answer was way off from the answer key... :(!

[img]http://i47.tinypic.com/2h2dsuf.png[/img]

Thank you...
• August 8th 2012, 05:14 AM
Plato
Quote:

Originally Posted by PennCow
I'm going over stuff for the final, but I can't figure out how they did this...

I tried hypergeometric distribution, but my answer was way off from the answer key.
[img]http://i47.tinypic.com/2h2dsuf.png[/img]

$\frac{\binom{7}{4}\binom{11}{1}}{\binom{18}{5}}=0. 044934640522876$
• August 8th 2012, 10:05 AM
PennCow