SOLUTION: A bag contains 3 red balls and 5 blue balls. One ball is taken at random, its colour noted, and put back into the bag. A second ball is taken at random , and again its colour is no

Question 334118: A bag contains 3 red balls and 5 blue balls. One ball is taken at random, its colour noted, and put back into the bag. A second ball is taken at random , and again its colour is noted.
What is the probability of obtaining two balls of different colours?

Answer by Edwin McCravy(20060) (Show Source): You can put this solution on YOUR website!


P(different colors) = P[(red first AND blue second) OR (blue first AND red second)]

"AND" means MULTIPLY and "OR" means ADD, so that equals

 P[red first] x P[blue second] + P[blue first] x P[red second] =

 =



Edwin

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