MC MULTIPLICATION RULE

You have a 73% chance of passing any stats quiz. What is the probability you fail one quiz, then pass the next 3?

• 39%

• 11%

• 8%

• 32%

Which event is not a dependent event?

• Picking 2 students to each be line leader and door holder from a group of 20 students
• Picking 2 marbles from a bag without replacing the first marble
• Picking 2 crayons from a box at the same time (simultaneously) 
• Picking an earring, replacing it, then picking a 2nd earring

Jim picks a diamond out of a deck of cards, replaces it and gets a diamond again. What is the probability this happened. (There are 13 diamonds, and 52 cards in a deck)

• 1/16
• 2/13
• 4/17
• 1/21

Mrs. Regan has a 12% chance of making a freethrow. What is the probability she shoots twice and makes both?

• 14%
• 1%
• 24%
• 5%

A bag contains 20 marbles: 5 blue, 8 green and 7 orange.

Find the probability of drawing a blue marble.

• 8/20 = 0.4

• 5/20 = 0.25

• 5/15 = 0.333

• 15/20 = 0.75

A bag contains 20 marbles: 5 blue, 8 green and 7 orange.

Now suppose we choose 3 marbles, returning the previous marble to the bag before choosing the next marble.

Each selection is considered ____________.

• Dependent

• Independent

Bag: 20 marbles, 5 blue

What is the probability of drawing three marbles with replacement and all three being blue? (Use a calculator. Round to four decimal places if needed.)

• 0.75

• 0.25

• 0.0156

• 0.0088

A bag contains 20 marbles: 5 blue, 8 green and 7 orange.

Now suppose we choose 3 marbles, WITHOUT returning the previous marble to the bag before choosing the next marble.

Each selection is considered ____________.

• Dependent

• Independent

Bag: 20 marbles, 5 blue

We draw the first marble and get a blue. We do not return it to the bag. What is the probability of the second marble being blue?

• 4/19

• 5/20

• 4/20

• 5/19

Bag: 20 marbles, 5 blue

We draw three marbles without replacement. What is the probability of all three being blue? (Use a calculator. Round to five decimal places as needed.)

• 0.25

• 0.62719

• 0.01563

• 0.00877