To find the probability of choosing a point NOT in the shaded region, you will need to find the area of the part of the figure that is not shaded when compared to the total area of the larger shape.
1. To find the area of the unshaded region, you will subtract the area of the larger circle and the area of the smaller circle.
A = pi x r^2 -
3.14 x 5^2 - 3.14 x 4^2
78.5 - 50.24
Area of the unshaded is 28.26 square inches.
Area of unshaded 28.26
Area of large circle = 78.5
Divide these to find the probability.
0.36 is 36% probability.
The probability if 36%.
