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March 5, 2015

March 5, 2015

Posted by **Vince** on Thursday, April 4, 2013 at 3:40pm.

A:50

B:60

C:30

D:38

I say it's B or A

- Math -
**Vince**, Thursday, April 4, 2013 at 3:44pmNvm i worked it out it's B

- Math -
**bobpursley**, Thursday, April 4, 2013 at 3:55pmHmmm. I agree with that answer is best, but to get 60 marbles in 150 draws would very seldom happen. In fact, it happens with a frequency of only .0664. Getting exactly 59 or 61 is almost the same...0.0653 and .0569 frequency.

http://ncalculators.com/statistics/binomial-distribution-calculator.htm

Your probablity of success (getting yellow) is .4 in the above question.

If your rich bud wanted to bet you a wager on getting exactly 60 yellow out of 150 tries, take him on, and make $$.

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