SOLUTION: A box contains 3 blue and 4 red marbles while another box contains 2 blue and 5 red marbles. A marble drawn at random from one of the boxes turns out to be blue. What is the probab

Algebra ->  Probability-and-statistics -> SOLUTION: A box contains 3 blue and 4 red marbles while another box contains 2 blue and 5 red marbles. A marble drawn at random from one of the boxes turns out to be blue. What is the probab      Log On


   



Question 1177705: A box contains 3 blue and 4 red marbles while another box contains 2 blue and 5 red marbles. A marble drawn at random from one of the boxes turns out to be blue. What is the probability that it came from the first box?
Answer by ikleyn(53765) About Me  (Show Source):
You can put this solution on YOUR website!
.

The probability is


     P = %28%283%2F7%29%29%2F%28%283%2F7%29+%2B+%282%2F7%29%29 = 3%2F5 = 0.6 = 60%.     ANSWER

Solved.

The formula used is self-explanatory.