Dependent Events Probability Practice

If I eat one green jelly baby, which tree diagram shows the correct probabilities for the second jelly baby ?

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What is the probability of eating 1 green and then 1 red jelly baby?

What's the probability that two red balls are picked?

Answer explanation

To find the probability of a combination of outcomes, multiply the probabilities along the relevant branches. If more than one combination gives the desired outcome, add their probabilities

What is the probability when Sue will randomly select from a treat bag containing 6 lollipops and 4 gum balls. Sue will select a treat, replace it, and then select a second treat. Find P(gumball then lollipop)

• 20/100

• 4/15

• 24/90

• 24/100

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)

• 4/90

• 4/100

• 5/90

• 5/100

A marble bag contains 3 red marbles, 4 gray marbles, 6 white marbles, and 5 black marbles. What is the probability of randomly drawing a red marble and then a gray marble if the first marble is replaced?

• 12/306

• 12/324

• 9/306

• 12/18

Is the event INDEPENDENT or DEPENDENT?
Amy plays card games.  She picks a card at random.  Then without putting the first card back, he picks a second card at random.

• Independent

• Dependent

A box contains 5 purple marbles, 3 green marbles and 2 orange marbles. Draws are made without replacement.P(both marbles are purple)

• 10/100

• 20/90

• 25/90

• 25/100

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(white, then purple, then black)

• 20/1000

• 20/90

• 3/10

• 20/720

A box contains 9 new light bulbs and 6 used light bulbs. Each light bulb is the same size and shape. Meredith will randomly select 2 light bulbs from the box without replacement. What is the probability Meredith will select a new light bulb and then a used light bulb?

• 1/54

• 54/225

• 54/210

• 9/35