KPrep Review17-Probability Models & Compound Events

The table shows the number of trees of different heights at a campground. What is the fractional probability that when a tree under 10 feet tall is selected at random, it is a cedar tree?

• 15/67

• 18/64

• 9/32

• 33/131

Tags

CCSS.8.SP.A.4

How do the probabilities associated with the two spinners compare?

• The probability of landing on 1 on Spinner A is 3/10.

• The probability of landing on 2 on Spinner B is 2/3.

• The probability of landing on 3 on Spinner A is equal to landing on 3 on Spinner B.

• The probability of landing on 2 on Spinner B is 2/5.

Tags

CCSS.7.SP.C.7B

Maki uses different patterned papers to make origami animals . She randomly selects 50 of the animals she has made to give to friends at a party. The experimental probability of each outcome is recorded in the table. For which spinner is the theoretical probability of spinning each outcome similar to the experimental probabilities in the table?

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The table shows the results of randomly selecting a sticker from a box of 40 animal stickers. The box contains equal numbers of four animal stickers: Horse, Cow, Sheep, and Pig. Each time a sticker is chosen, it is returned to the box.

Determine which experimental probabilities are greater than the theoretical probability for each type of animal sticker.

• Horse

• Cow

• Sheep

• Pig

If the spinner is spun 120 times, what is the best estimate of the number of times it will land on Soccer?

• 30

• 13

• 40

• 26

Tags

CCSS.7.SP.C.6

Gavin has 7 shirts, 5 pairs of pants, and 3 pairs of shoes. How many possible outcomes of 1 shirt, 1 pair of pants, and 1 pair of shoes are possible?

• 15

• 105

• 3

• 315

Matilda is spinning a spinner with eight equal-sized sections numbered 1 through 8. She spins the spinner two times. What is the probability that Matilda's first spin will be an odd number and her second spin will be a number less than 3?

• 1/8

• 3/16

• 1/64

• 3/4

Trina is buying a two-scoop ice cream cone. She can choose from the flavors vanilla (V), chocolate (C), strawberry (S), and peppermint (P). She makes a tree diagram to represent the sample space.

Trina randomly chooses two scoops of ice cream. If each flavor is equally likely to be chosen, what is the probability that she chooses two scoops of the same flavor?

• 1/2

• 1/4

• 1/3

• 4/20

Tags

CCSS.7.SP.C.8B

Darcie is making a wood shelf for displaying her plate collection. She will choose from 4 types of wood, 8 stain colors, and 2 shelf widths. How many possible outcomes of 1 type of wood, 1 stain color, and 1 shelf width are possible?

• 42

• 192

• 64

• 14

Holden is ordering a welcome sign for his business. He randomly chooses between matte- or gloss-finish paper. Then he randomly chooses a light, medium, or heavy paper weight. Finally, he randomly chooses blue, green, yellow, or white paper. The tree diagram displays Holden's possible options.

Determine the true statements.

• The probability that Holden chooses a matte-finish paper is 1/2.

• The probability that Holden chooses a gloss-finish medium-weight green paper is 1/12.

• The probability that Holden chooses a lightweight paper is greater than the probability that he chooses blue paper.

• The probability that Holden chooses a matte-finish heavy-weight paper is 1/3.

Tags

CCSS.7.SP.C.8B