Dependent Probability Practice

Des buys a pack of Starbursts that has 3 orange, 6 pink, 1 yellow, and 5 red Starbursts.  She puts the candy in the bowl.  If she reaches in and grabs two Starbursts without putting one back, what is the probability that she will pick a pink and then a yellow?

• 1/35

• 7/210

• 6/225

• 2/75

You have 6 blue blocks, 8 red blocks, 2 yellow blocks, and 4 green blocks in a bag. What is the probability of selecting a red block, putting it on the table and then selecting a blue block? Is that an independent or dependent event?

• 3/25 dependent

• 3/25 independent

• 12/95 dependent

• 12/95 independent

A bag contains some red-colored and some blue-colored marbles. First a red-colored marble is drawn and then, without replacing the first marble, a blue-colored marble is drawn. Are the two events dependent or independent?

• Independent

• Dependent

Two marbles are drawn from a container in such a way that the first marble drawn is REPLACED before selecting the second marble. Classify this event as dependent or independent.

• Independent

• Dependent

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. P(purple then black)

• 1/18

• 2/5

• 3/7

• 4/9

There are six nickels and seven dimes in your pocket. You randomly pick a coin out of your pocket and then return it to your pocket. Then you randomly pick another coin. Both times the coin is a nickel.

• 6/13

• 2/7

• 5/16

• 3/19

Bag A contains 9 red marbles and 3 green marbles. Bag B contains 9 black marbles and 6 orange marbles. Find the probability of selecting one green marble from bag A and one black marble from bag B.

• 3/20

• 1/4

• 3/31

• 2/27

Is the event INDEPENDENT or DEPENDENT?

Amy is playing a card game. She picks a card at random. Then without putting the first card back, she picks a second card at random.

• Independent

• Dependent

If you draw out a red marble, keep it, then draw out a blue marble, is it independent or dependent probability?

• Independent

• Dependent

A box contains 5 purple marbles, 3 green marbles and 2 orange marbles. They will draw 2 times and draws are made without replacement. What is the Probability of both marbles being purple?

• 2/9

• 1/3

• 1/2

• 1/4