Khan/khan-exercises — Issue #11541: Probability 1 - Probability 1 - Either or
Author: KhanBugz
Created: 2012-01-18 19:15:05+00:00
State: open
Labels: firefox, win7, wrong-or-unclear

Hi there!
I am asked what the probability is of getting a number divisible by EITHER 3 OR 5 in the range 41...50 - 45 is divisible by 3 AND 5, so I excluded this and got 3/10 as answer, which is stated wrong. But maybe it's cause I'm not a native speaker and thinking too much in programming terms :)
Anyway, keep up this great site, have lots of fun and had to remember many things long forgotten :)

[probability_1.html?seed=161&problem=3](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/probability_1.html?seed=161&problem=3&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/probability_1.html?seed=161&problem=3&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5C%223%2F10%5C%22%22%2C25%5D%2C%5B%22hint-activity%22%2C%220%22%2C2%5D%2C%5B%22hint-activity%22%2C%220%22%2C5%5D%5D)

["3/10"]

Mozilla/5.0 (Windows NT 6.1; WOW64; rv:9.0.1) Gecko/20100101 Firefox/9.0.1

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