SOLUTION: A bag contains 4 blue marbles, 3 red marbles, 2 green marbles and a white marble. You reach in and randomly pick one marble, set it aside, and then randomly pick a second marble.

Algebra ->  Probability-and-statistics -> SOLUTION: A bag contains 4 blue marbles, 3 red marbles, 2 green marbles and a white marble. You reach in and randomly pick one marble, set it aside, and then randomly pick a second marble.       Log On


   

Question 350116: A bag contains 4 blue marbles, 3 red marbles, 2 green marbles and a white marble. You reach in and randomly pick one marble, set it aside, and then randomly pick a second marble. What is the probability of picking two blue marbles?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
4 blue marbles
3 red marbles
2 green marbles
1 white marble
10 total
.
.
.
To choose the 1st blue marble,
P%28B%29=4%2F10=2%2F5
To choose the 2nd blue marble,
P%28B%29=3%2F9=1%2F3
The probability of choosing both is,
P%282B%29=%282%2F5%29%281%2F3%29=2%2F15