Joseph C. answered • 04/04/15

Joseph, Trilingual instructor, Paso Robles, CA

In this case, there are 11 balls, 5 red, and 6 blue.

So the chance of drawing one blue ball will be 6 divided by 11, or 54.5%

Once a blue ball has been drawn, there will be 5 red balls, and 5 blue balls.

So, the chance of drawing a blue ball will 5 divided by 10, or 50%

The probability of the two events is the product of the two values, or 0.545 x 0.5 = 0.275 = 27.5%