SOLUTION: A bag contains 7 blue marbles, 3 green marbles, and 5 yellow marbles. Suppose you draw two marbles at random. What is the probability that you draw:a blue marble and a green marble

Algebra ->  Finance -> SOLUTION: A bag contains 7 blue marbles, 3 green marbles, and 5 yellow marbles. Suppose you draw two marbles at random. What is the probability that you draw:a blue marble and a green marble      Log On


   

Question 1158392: A bag contains 7 blue marbles, 3 green marbles, and 5 yellow marbles. Suppose you draw two marbles at random. What is the probability that you draw:a blue marble and a green marble in any order ?
Answer by ikleyn(52772) About Me  (Show Source):
You can put this solution on YOUR website!
.

    P = P(1-st is blue, 2-nd is green) + P(1-st is green,2-nd is blue) = 


      = %287%2F15%29%2A%283%2F14%29 + %283%2F15%29%2A%287%2F14%29 = 21%2F210 + 21%2F210 = 1%2F10 + 1%2F10 = 2%2F10 = 1%2F5 = 0.2.    ANSWER