Solving Dependent Probability Problems

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

What is the probability of drawing a 9, then drawing a number divisible by 1? (no replacement--dependent event)

• 8/56 = 1/7

• 1/8

• 8/7

• 2/9

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 6, then drawing an odd number? (no replacement--dependent event)

• 3/8

• 9/56

• 10/56 = 5/28

• 3/7

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

• 2/9

• 1/3

• 1/2

• 1/4

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)

• 1/36

• 2/39

• 5/41

• 6/43

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

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

What is the Probability of drawing a white, then purple, then black?

• 1/36

• 2/39

• 5/41

• 6/43

Dependent probability happens when the first item is not replaced, causing the total outcomes to decrease by 1.

• true

• false