Dependent Events

A jar contains 4 white playing chips, 5 purple chips, and 1 black chip. Chips are selected randomly one at a time, and are not replaced. Find P(purple then black)

• 1/18

• 2/5

• 3/7

• 4/9

A jar contains 4 white chips, 5 purple chips, and 1 black chip. Chips are selected randomly one at a time, and are not replaced. Find P(white, then purple, then black)

• 1/36

• 2/39

• 5/41

• 6/43

What is the probability of the arrow stopping on “X” on the first spin and “F” on the second spin?

• 5/6

• 1/36

• 1/3

• 1/6

Is the event INDEPENDENT or DEPENDENT?

Amy plays card games. She picks a card at random. Then without putting the first card back, she picks a second card at random.

• Independent

• Dependent

What is the probability of drawing a 6, then drawing an odd number? (no replacement--dependent event)

• 3/8

• 9/56

• 10/56 = 5/28

• 3/7

What is the probability of drawing an odd number, then drawing a 6? (no replacement--dependent event)

• 3/8

• 3/7

• 9/56

• 5/37

What is the probability of drawing an even number, then drawing a 1? (no replacement--dependent event)

• 5/8

• 2/7

• 10/56 = 5/28

• 2/56 = 1/28

What is the probability of drawing a prime number, then drawing a composite number? (no replacement--dependent event)

• 6/56 = 3/28

• 4/8 = 1/2

• 16/56 = 2/7

• 8/56 = 1/7

What is the probability of drawing a 9, then drawing another 9? (no replacement--dependent event)

• 1/8

• 4/8 = 1/2

• 0

• 2/9

A bag contains 5 quarters, 2 dimes, and 4 pennies. What is the probability of picking a quarter, not replacing it, and then picking a penny?

• ²⁰/₁₂₁

• ⁸/₁₂₁

• ²/₁₁

• ⁴/₅₅