Probability Practice

Marissa has a bag of marbles, all the same size and shape; the colors of the marbles are as follows: 4 pink, 2 blue and 3 green. She will randomly select two marbles from the bag with no replacement. What is the probability that she will select a pink marble and then NOT a blue marble?

• 30%

• 33%

• 39%

• 35%

Brody rolls a six-sided number cube two different times. What are the chances that he will roll an odd number each time?

• 9/36 = 25%

• 1/36 = 3%

• 6/30 = 20%

• 9/12 =75%

A bag contains 5 cards numbers 1, 2, 3, 3, 4. If one card is selected at random from the box and NOT replaced, what is the probability that Jill will draw 3 and then a 1?

• 1/25

• 1/20

• 1/10

• 2/25

Which has the greatest probability of occurring?

• A. A student rolls a number cube containing digits 1 through 6, and he rolls a 2.

• B. Give a bag containing 2 red marbles, 3 blue marbles, and 5 yellow marbles, a student pulls a yellow marble.

• C. A student rolls two number cubes containing the digits 1 through 6, and both cubes land on a 2.

• D. Given a bag containing 2 red marbles, 3 blue marbles, and 5 yellow marbles, a student pulls two yellow marbles without replacing the first yellow marble.

Celeste has a bag of different colored tiles, all the same shape and size. There are 10 yellow, 5 red and 3 blue. Celeste draws two tiles out of the bag randomly. What are the chances that she will NOT choose blue tile on her first draw, put it aside, and then NOT choose a blue tile on her second draw?

• Independent - 69%

• Dependent - 69%

• Independent - 74%

• Dependent - 65%

1. Jesse and Savannah pick pieces of candy out of a large bag. In the bag, 6 pieces of candy are chocolate and 6 pieces are fruity.

Jesse chooses a piece, replaces it, and then chooses another piece.

Savannah choose a piece, does not replace it, and then chooses a second piece.

Who has the greater probability of choosing a chocolate piece and then choosing a fruity piece?

• Jesse because 36/144 > 36/132

• Savannah because 36/144 > 36/132

• Jesse because 36/132 > 36/144

• Savannah because 36/132 > 36/144

Amya is selecting popsicles from the freezer – 40% of the popsicles she has are red. What is the probability that Amya will grab a popsicle that is NOT red, replace it, then grab another popsicle that is also NOT red? Select the correct probability of these events from the number-line below.

• 36% - A

• 16% - A

• 16% - B

• 36% - B