Help solve this. (Sorry)

Question

A bag contains 5 red marbles, 11 blue marbles, and 6 yellow marbles. You randomly draw a marble from the bag. Then, you randomly draw another marble without replacing the first marble. Find the probability of drawing a blue marble, then a red marble.

Answer 1

Hi Amy,

 

The probability of drawing a blue marble is 11/22 or 1/2

 

After that pick the probablility of drawing a red marble is 5/21

 

and the probability of those two events happening in that order is

 

1/2 * 5/21 = 5/42

 

or 11.905%