+128406 6. Less than 2 = 1/10
Greater than 7 = 3/10
So 1/10 + 3/10 = 4/10 = 2/5
7. Area A = pi (4)^2 = 16pi
Area B = Area B - Area A = pi (4 + 4)^2 - pi (4)^2 = 48 pi
Area C = pi (4 + 4 + 4)^2 - pi (4 + 4)^2 = 144pi - 64pi = 80pi (3)
Area D = pi (4 + 4 + 4 + 4)^2 - Pi(4 + 4 + 4)^2 = 256pi - 144pi = 112pi
Prob B = Area B / sum of the areas = 48pi / ( [ 16 + 48 + 80 + 112] pi ) =
48 / 256 =
3 / 16
