a) If the odds of the Maple Leafs winning the Stanley Cup are 7:11, what is probability that they will win the Stanley Cup?

b) Six friends go to their favourite restaurant, which has ten entrees on the menu. If the friends are equally likely to pick any of the entrees, what is the probability that at least two of them will order the same one?

c) Use a tree diagram to explain why the probability that a family with three children has either all girls or all boys is1/4 , assuming that the probability of having a boy equals the probability of having a girl.