Posted by chris on Sunday, January 23, 2011 at 2:37pm.
a bag contains 12 black checkers and 12 red checkers. What is the probability of choosing two red checkers?

math  Reiny, Sunday, January 23, 2011 at 3:46pm
Did this students have the complete question?
http://www.jiskha.com/display.cgi?id=1275904679
Yours in incomplete.
You don't say how many checkers are chosen.

math  MathMate, Sunday, January 23, 2011 at 3:46pm
P(R1)=12/24 (first red)
P(R2)=11/23 (second red)
P(2*R)=(12/24)*(11/23)=11/46 (both red)
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