SOLUTION: A bag contains 1 red ball, 2 green balls, 2 white balls, and 5 black balls. A random ball is removed and its color is recorded. The ball is returned to the bag, then another random

Algebra ->  Probability-and-statistics -> SOLUTION: A bag contains 1 red ball, 2 green balls, 2 white balls, and 5 black balls. A random ball is removed and its color is recorded. The ball is returned to the bag, then another random      Log On


   

Question 636759: A bag contains 1 red ball, 2 green balls, 2 white balls, and 5 black balls. A random ball is removed and its color is recorded. The ball is returned to the bag, then another random ball is removed. What is the probability that the first ball is black and the second ball is not red?

Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

 10 balls: 1 red, 2 green, 2 white, and 5 black 

random ball drawn with replacement, and a second is drawn...

P( B 'and then' not red) =  %285%2F10%29%289%2F10%29+=+9%2F20