Sheet # 29/Probability
Name: _____________________ Date_____________
1) There are 35 bricks of which five are gold. What is the chance that if you pick a brick at random, you will pick a gold one?
("At random" in this case means "without looking and without lifting.")
2) A bowl contains five white marbles, three black marbles and two red marbles.
a) What is the probability that you will pick a white marble ?
b) Assuming you pick a white marble the first time and do not replace it, what is the probability that you will pick a black marble the second time?
c) Assuming you pick a white marble the first time and a black marble the second time and do not replace them, what is the chance that you will pick a red marble the third time?
3) The letters A, B, C, D, E and F are printed on the faces of a cube (one on each face)
a) If one cube is rolled, how many possible outcomes are there? We will consider the side facing up as the outcome in this case?
b) If one cube is rolled, what is the chance of getting the letter A?
c) If one cube is rolled, what is the chance of not getting the letter B?