Can you work out which spinners were used to generate the frequency charts?
Invent a set of three dice where each one is better than one of the others?
Will the witch make a profit or loss?
Four cards are shuffled and placed into two piles of two. Starting with the first pile of cards - turn a card over... You win if all your cards end up in the trays before you run out of cards in. . . .
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. . . .
Two brothers belong to a club with 10 members. Four are selected for a match. Find the probability that both brothers are selected.
A bag contains red and blue balls. You are told the probabilities of drawing certain combinations of balls. Find how many red and how many blue balls there are in the bag.