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May 30, 2015

Homework Help: PROBABILITY MATH

Posted by HM on Wednesday, November 2, 2011 at 1:25pm.

a spinner has regions numbered through 1-21

what is the probability that the spinner will stop on an even number or a multiple of 3..

I am confused.
I keep coming up with 17/21

but the real answer is 2/3

how how how ?

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