The blonde reported for her University final examination which
consists of “yes/no” type questions.

She takes her seat in the examination hall, stares at the question
paper for five minutes, and then in a fit of inspiration takes her
purse out, removes a coin and starts tossing the coin and marking
the answer sheet – Yes for Heads and No for Tails. Within half an
hour she is all done whereas the rest of the class is sweating it
out.

During the last few minutes, she is seen desperately throwing the
coin, swearing and sweating.

The moderator, alarmed, approaches her and asks what is going on.

“I finished the exam in half and hour. But, she says, I am
rechecking my answers!”