
Probability review---Block 1
Authored by Valene Williams
Mathematics
7th Grade
CCSS covered
Used 1+ times

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25 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Saryiah is conducting an experiment using a bag of marbles. For each trial of the experiment, she takes 1 marble from the bag without looking. She records the color and then replaces the marble in the bag. The table shows the results of 60 trials of the experiment.
Blue = 15
Green = 25
yellow = 20
Saryiah will conduct 20 more trials of the experiment. Based on the results in the table, approximately how many of those marbles will be blue?
17
13
20
40
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Na'zya is conducting an experiment in which she draws a straw. Some of the straws are short, and some are long. For each trial, she draws a straw, records the result, and replaces the straw. The table shows the results of 60 trials of the experiment.
Long = 12
Short = 48
Na'zya will conduct 30 more trials of the experiment. Based on the results in the table, how many of these additional trials will have a result of a short straw being drawn?
24
48
12
56
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Each year in middle school, students are randomly assigned to one of 4 electives. The probability of a random student being assigned to each elective is shown below:
Art = 0.01
Band= 0.002
Chorus = 0.357
Computers = ????
If every student is assigned to an elective, what is the probability that a student is assigned to computers?
0.361
0.006
0.212
0.631
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Each year in middle school, students are randomly assigned to one of 4 electives. The probability of a random student being assigned to each elective is shown below:
Art = 0.01
Band= 0.002
Chorus = 0.357
Computers = ????
If every student is assigned to an elective, what percentage of students chose computers?
63%
6%
21%
36%
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
At Kennedy Middle School, students have several options for lunch each day. For the main dish, students can choose a hamburger, pizza, chef's salad, or grilled chicken sandwich. For a side item, students can choose either an apple, carrot sticks, or potato puffs. For dessert, students can choose either a cookie or a pumpkin pie. Each student will also receive either a carton of lowfat milk, bottle of water or a can drink. How many different variations can students choose for their main dish, side item, dessert, and drink?
24
72
36
42
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Christopher has a bag with orange, yellow, and blue chips in it. Without looking, he reaches into the bag and removes a chip. He records the color and returns the chip to the bag. He performs this experiment 40 times. The table shows the data he collects.
Orange = 12
Yellow = 15
Blue = 13
Based on the information in the table, how many orange chips should Christopher expect to select out of the bag after repeating this experiment 80 times?
40
60
20
24
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hailey recreated an experiment in which the probability of drawing a red card from a stack of red, blue, yellow, green and purple cards is 1/5. She draws a card, records it, replaces it, and then draws another card and continues this procedure 100 times. At the end of her experiment she notices that she has drawn a red card 42 times. Which of the following statements is true about Hailey’s experiment?
Hailey's results are the same as the predicted results.
Hailey’s results are lower than the predicted results.
Hailey’s results are higher than the predicted results.
Hailey's deck of cards contains more red cards.
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