SOLUTION: Two marbles are drawn without replacement from a box with 3 white, 2 green, 2 red and 1 blue marble. Find the probability. At least one of the marbles is red.

Algebra ->  Customizable Word Problem Solvers  -> Finance -> SOLUTION: Two marbles are drawn without replacement from a box with 3 white, 2 green, 2 red and 1 blue marble. Find the probability. At least one of the marbles is red.      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 245801: Two marbles are drawn without replacement from a box with 3 white, 2 green, 2 red and 1 blue marble. Find the probability. At least one of the marbles is red.
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
ways of drawing 2 from 8 ___ 8C2 = 28

ways of drawing 2 from 6 (NO red marbles) ___ 6C2 = 15

probability of NO red marbles ___ 15/28

probability of (at least one) red marble ___ 1 - 15/28 = 13/28