help me with this math i think

Algebra
Tutor: None Selected Time limit: 1 Day

Mar 18th, 2015

P(prime)=8/20=2/5

P(not prime)=1-2/5=3/5..............................please best me

Mar 18th, 2015

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Mar 18th, 2015
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Mar 18th, 2015
Dec 4th, 2016
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