# 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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 Click here to see ALL problems on Probability-and-statistics 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(57290)   (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)? --- red and blue are mutually exclusive events. ---- P(2red OR 2blue) = P(2red) + P(2blue) = 20C2/45C2 + 25C2/45C2 ------ = [20C2+25C2]/45C2 = 490/990 = 0.4949 ========================================== Cheers, Stan H. =========