Lesson 31 Quiz

A basketball player makes 6 out of 10 free throws. Based on her results, how many of her next 35 free throws will she not make?

• A) 4

• B) 7

• C) 14

• D) 21

There are 52 cards in a deck. Each card contains a letter or a number. Theo selects a card at random, records the letter or number, and puts the card back in the deck. The results of his first 6 trials are S, A, 2, 8, Q, and 9. Using Theo's results, determine the number of number cards he will select in 24 trials.

• 10

• 12

• 14

• 16

• 1/2

• 10/21

• 35/71

• 1/3

Milo, Karthik, and Adelyn are each given a bag with an unknown number of letter tiles. Each person selects a tile at random from their bag and then puts it back. This procedure is repeated until each person has selected 45 tiles. The results of the experiment are shown in the table. Which of the following conclusions can be reached based on the data? Choose all the correct answers. (2 points)

• A. There are no tiles with the letter D in Milo's bag.

• B. If Adelyn selects 9 more tiles, about 2 of them will be the letter C.

• C. The probability of Milo selecting the letter D and the probability of Karthik selecting the letter B are the same.

• D. The probability of Karthik selecting the letter B is 25%.

• E. The probability of Adelyn selecting an A, B, C, or D is approximately the same.

Varsha has a multi-colored pack of pens. At the start of each class she randomly selects a blue, black, purple, or red pen from the pack and replaces it after class. The table shows the pen color she selected over the last 16 classes. Is it likely that there are equal numbers of each color pen in the pack?

• Yes, it is likely because the differences in the selection frequencies can be attributed to natural random variation.

• No, it is unlikely because the selective frequencies deviate too much from what would be expected if the numbers were equal.

• It is impossible to tell from the given data.

• The randomness of the selection does not allow any conclusion on the equality of the pen numbers.

You spin the spinner 25 times. Here are your results:

Green-7

Blue-5

Red-9

Yellow-4

What is the experimental probability of landing on blue?

• 1/3

• 1/5

• 4/25

• 3/11

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.6

Andrew picks one marble at a time from a box and replaces it. He repeats this process 25 times and records the results in the table. Based on the table, which color marble has an experimental probability of 1/5?

• Yellow

• Red

• Blue

• Green

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.6

CCSS.7.SP.C.7

CCSS.7.SP.A.1

CCSS.7.SP.A.2

Marco has two number cubes. The faces of each number cube are numbered from 1 to 6. Marco rolled the number cubes and recorded the number showing on the top face of each number cube. The results are shown in the table. Based on these results, what is the experimental probability that the next time the number cubes are rolled, they will land with a 2 showing on the top face of one number cube and a 4 showing on the top face of the other number cube?

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.6

CCSS.7.SP.C.7

CCSS.7.SP.C.8

A bag has 3 red marbles, 2 blue and 4 yellow. What is the theoretical probability of pulling a red?

• 3/10
• 3/9
• 1/9
• 1/3

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.7