Question

If O is the centre of the larger circle, what is the probability that point chosen at random within the circumference of the larger circle, lies outside the smaller circle!?​

Answer 1

Explanation:

Let S denote the set of points inside the circle with radius r, and let A denote the set of point inside the concentric circle with radius

2

1

r.

Thus, A consists precisely of those points of S which are closer to the center than to its circumference.

Therefore, p=P(A)=

πr

2

π(

2

r

)

2

=

4

1

l hope it will help u dude