C. THE AREA OF THE BIG CIRCLE IS ΠR2= 64Π, ANDOBTAINED BY ADDING 4...

12. c. The area of the big circle is πr

²

= 64π, andobtained by adding 4 to k– 1, which gives the area of the shaded circle is πr

²

= 4π. So,k– 1 + 4 or k+ 3.the probability of hitting the shaded part is