SOLUTION: A stained glass window has 25 blue pieces and 20 red pieces. If 2 pieces are selected at random, what is P(2 red or 2 blue)?
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Question 589901: A stained glass window has 25 blue pieces and 20 red pieces. If 2 pieces are selected at random, what is P(2 red or 2 blue)? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! A stained glass window has 25 blue pieces and 20 red pieces. If 2 pieces are selected at random, what is P(2 red or 2 blue)?
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red and blue are mutually exclusive events.
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P(2red OR 2blue) = P(2red) + P(2blue) = 20C2/45C2 + 25C2/45C2
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= [20C2+25C2]/45C2 = 490/990 = 0.4949
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Cheers,
Stan H.
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