Question

Based on the images below, what is the probability of landing in the red area? Note that the radius of the inner circle is 1cm and that each ring following that has a width of 1cm.

Answer 1

Explanation:

Area of inner circle pi r^2 = pi * 1^2 = pi

Area of largest circle pi r^2 = pi ( 4^2 ) = 16 pi

prob of red is then: red area / total area = pi / (16 pi) = 1/16 =.0625 = 6.25 %