prove that the perpendicular at the point of contact to the tangent to a circle passes through the centre.
prove that the perpendicular at the point of contact to the tangent to a circle passes through the centre.
first bag contains 3 red 4 black balls bag second contains 4 red 5 black and one ball is transformed from bag 1 to 2 than a ball is drawna from bag second and it was found to be red