A high school has 150 Gr. 9 students, 150 Gr. 10 students, 100 Gr. 11 students, and 100 Gr. 12 students. Describe how you could use a stratified sampling technique if you were asked to survey a total of 50 students.

Four people are playing a card game using a standard deck of cards. Each player is dealt a hand of 7 cards. What is the probability of a hand containing:

a. exactly 3 kings?

b. less than 3 fives? (3 marks)

c. 3 fives or 4 fives? (use the indirect method.)