Conditional and compound probabilities

What is the probability of choosing a red marble?

• 9 out of 20

• 5 out of 20

• impossible

What is the probability of choosing a red marble, replacing it, and then choosing a blue marble? simplify your answer (solve using a dry erase or paper)

*hint: "and" means to multiply*

• 3 out of 50

• 6 out of 100

• 3 out of 100

• 2 out of 20

What is the probability of choosing a red marble, keeping it, and then choosing a blue marble. (simplify your answer)

*hint: keeping it means you don't put it back*

• 3 out of 45

• 6 out of 90

• 1 out of 15

• not here

For independent probabilities, the total_________.

• stays the same

• becomes one less

• changes

• increases by one

For dependent probability, the total________.

• decreases by 1

• stays the same

• increases by 1

Is the probability of flipping the coin and rolling the die independent or dependent?

• dependent, rolling a number on the die depends on the result from flipping the coin

• independent, rolling a number on the die does not depend on the result from flipping the coin

• neither

What is the probability of the coin landing on heads when flipped, and the die landing on six when rolled?

• 1 out of 12

• 1 out of 6

• impossible

What is the probability of choosing a blue marble twice in a row, without replacing the first one.

• 2 out of 90

• 1 out of 45

• 2 out of 8

• 1 out of 4

Find the probability of drawing a 10 from a standard deck of 52 cards.

• 4 out of 52

• 13 out of 52

• 13/52

• 4/52

The outcome of one event does not influence the outcome of the other event.

• independent event

• tree diagram

• simple event

• odds