AnswersConcepts in Probability and Statistics AProbability and Two-Way Tables

Probability and Two-Way Tables Answers

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1
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Information about the students at Jackson High School is shown in the table.

Question illustration
A
Out of the 352 eleventh graders at the school, 173 of them are girls.
B
Out of the 511 boys at the school, 150 of them are tenth graders.
C
Out of the 523 tenth graders at the school, 173 of them are boys.
D
Out of the 376 girls at the school, 182 of them are eleventh graders.
2
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The two-way table shows the ages of the players on different soccer teams.Which statement is true?

Question illustration
A
The probability that a randomly selected player on Team A is 8 years old is .
Option A
B
The probability that a randomly selected 8-year-old player is on Team C is .
Option B
C
The probability that a randomly selected player on Team C is 10 years old is .
Option C
D
The probability that a randomly selected 10-year-old player is on Team B is .
Option D
3

Mr. Carandang sold a total of 1,790 prints of one of his drawings. Out of all 1,273 unframed prints that he sold, 152 were small and 544 were medium-sized. Out of all of the framed prints that he sold, 23 were small and 42 were extra large. Of the large prints that he sold, 188 were framed and 496 were unframed. SmallMediumLargeExtra LargeTotalFramed 23 264 188 42 ?Unframed 152 544 496 81 1,273Total 175 808 684 123 1,790

A
329
B
475
C
517
D
1,034
4

For the soccer banquet, the players and their family members selected their favorite main dish and side dish. Of the 39 people who chose chicken as the main dish, 18 wanted potatoes. Of the 32 people who chose rice as a side dish, 6 chose fish as a main dish. A total of 8 people chose a vegetarian meal with potatoes, and a total of 10 people chose fish as their main dish.

A
A 5-column table has 3 rows. The first column has entries Rice, Potatoes, Total. The second column is labeled Chicken with entries 18, 21, 39. The third column is labeled Fish with entries 4, 6, 10. The fourth column is labeled Vegetarian with entries 8, 5, 13. The fifth column is labeled total with entries 30, 32, 62.
Option A
B
A 5-column table has 3 rows. The first column has entries Rice, Potatoes, Total. The second column is labeled Chicken with entries 21, 18, 39. The third column is labeled Fish with entries 6, 4, 10. The fourth column is labeled Vegetarian with entries 5, 8, 13. The fifth column is labeled total with entries 32, 30, 62.
Option B
C
A 5-column table has 3 rows. The first column has entries Rice, Potatoes, Total. The second column is labeled Chicken with entries 14, 18, 32. The third column is labeled Fish with entries 6, 4, 10. The fourth column is labeled Vegetarian with entries 19, 8, 27. The fifth column is labeled total with entries 39, 30, 69.
Option C
D
A 5-column table has 3 rows. The first column has entries Rice, Potatoes, Total. The second column is labeled Chicken with entries 18, 14, 32. The third column is labeled Fish with entries 4, 6, 10. The fourth column is labeled Vegetarian with entries 8, 19, 27. The fifth column is labeled total with entries 30, 39, 69.
Option D
6

The two-way table shows the medal count for the top-performing countries in the 2012 Summer Olympics.Which statement is true?

Question illustration
A
The probability that a randomly selected silver medal was awarded to Great Britain is .
Option A
B
The probability that a randomly selected medal won by Russia was a bronze medal is .
Option B
C
The probability that a randomly selected gold medal was awarded to China is .
Option C
D
The probability that a randomly selected medal won by the United States was a silver medal is .
Option D
7

The two-way table shows the preferred vacation destination for people in different age groups.Which statement is true?

Question illustration
A
The probability that a randomly selected adult chose Hawaii as the preferred destination is .
Option A
B
The probability that a randomly selected person who chose Hawaii as the preferred destination is a teenager is .
Option B
C
The probability that a randomly selected child chose Florida as the preferred destination is .
Option C
D
The probability that a randomly selected person who chose Mexico as the preferred destination is a child is .
Option D
8

Which statements are true? Select three options.

A
Milk was requested for 16 of the large-sized meal orders.
B
Soda was requested for 280 of the kids’ meal orders.
C
A juice box was requested for 82 of the regular-sized meal orders.
D
Sixty-three of the orders of soda came with a regular-sized meal.
E
A total of 124 large-sized meals were ordered.
9

A survey was taken of children between the ages of 7 and 12. Let A be the event that the person rides the bus to school, and let B be the event that the person has 3 or more siblings.Which statement is true about whether A and B are independent events?

Question illustration
A
A and B are independent events because P(A∣B) = P(A) = 0.12.
B
A and B are independent events because P(A∣B) = P(A) = 0.25.
C
A and B are not independent events because P(A∣B) = 0.12 and P(A) = 0.25.
D
A and B are not independent events because P(A∣B) = 0.375 and P(A) = 0.25.
10

The two-way table shows the number of books of each type in Eliza’s home.What is the probability that a randomly selected reference book is hardcover?

Question illustration
A
0.25
B
0.4
C
0.6
D
0.75

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