A man went to Monte Carlo to try and make his fortune. Is his strategy a winning one?
Two bags contain different numbers of red and blue marbles. A marble is removed from one of the bags. The marble is blue. What is the probability that it was removed from bag A?
You and I play a game involving successive throws of a fair coin.
Suppose I pick HH and you pick TH. The coin is thrown repeatedly
until we see either two heads in a row (I win) or a tail followed
by a head (you win). What is the probability that you win?
A star is placed in the bottom right hand corner of a grid. You
toss a coin and
If after tossing the coin the star would move off the grid you
What is the probability that you end up in the top left-hand
corner of the grid for 2 x 2, 3 x 3, 4 x 4 and n x n grids?