Suppose that all of the points on the circular dartboard shown are equally likely to be hit by a dart. If the radius of the shaded center circle is 1 and the radius of the entire dartboard is 4, what is the probability of throwing a dart and hitting the white part of the board? Round your answer to the nearest whole number.

Question

anonymous · Answer

@hartnn

anonymous · Answer

@hartnn

hartnn · Answer

what is the area of shaded circle ?
what is the area of entire board ?

anonymous · Answer

area of entire 8
area of shaded circle is 2

hartnn · Answer

area of circle is pi * r^2 
right ?
shaded circle has r = 1 
so, its area = pi 1^2 = pi
isn't it ?

anonymous · Answer

not sure but thanks for trying to help

hartnn · Answer

you know what is the area of circle, right ?