AnswersMathematics 8Making Two-Way Tables — QuizQuestion 8
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Making Two-Way Tables — Quiz

Question 8 • Mathematics 8

Michal makes a table to show which of her friends have siblings. She counts 6 boys who have no siblings and 9 girls who have no siblings. She counts 10 friends who are boys and 18 friends who are girls. Which table correctly shows the data?

Answer
A
Table with 4 columns and 4 rows.Row 1: Column 1, empty; Column 2, 'Siblings'; Column 3, 'No Siblings'; Column 4, 'Total' Row 2: Column 1, 'Boys'; Column 2, '4'; Column 3, '6'; Column 4, '10' Row 3: Column 1, 'Girls'; Column 2, '9'; Column 3, '9'; Column 4, '18' Row 4: Column 1, 'Total'; Column 2, '13'; Column 3, '15'; Column 4, empty
B
Table with 4 columns and 4 rows.Row 1: Column 1, empty; Column 2, 'Siblings'; Column 3, 'No Siblings'; Column 4, 'Total' Row 2: Column 1, 'Boys'; Column 2, '6'; Column 3, '9'; Column 4, '15' Row 3: Column 1, 'Girls'; Column 2, '12'; Column 3, '1'; Column 4, '13' Row 4: Column 1, 'Total'; Column 2, '18'; Column 3, '10'; Column 4, empty
C
Table with 4 columns and 4 rows.Row 1: Column 1, empty; Column 2, 'Siblings'; Column 3, 'No Siblings'; Column 4, 'Total' Row 2: Column 1, 'Boys'; Column 2, '6'; Column 3, '9'; Column 4, '15' Row 3: Column 1, 'Girls'; Column 2, '4'; Column 3, '9'; Column 4, '13' Row 4: Column 1, 'Total'; Column 2, '10'; Column 3, '18'; Column 4, empty
D
Table with 4 columns and 4 rows.Row 1: Column 1, empty; Column 2, 'Siblings'; Column 3, 'No Siblings'; Column 4, 'Total' Row 2: Column 1, 'Boys'; Column 2, '6'; Column 3, '12'; Column 4, '18' Row 3: Column 1, 'Girls'; Column 2, '9'; Column 3, '1'; Column 4, '10' Row 4: Column 1, 'Total'; Column 2, '15'; Column 3, '13'; Column 4, empty

Explanation

There are 10 boys altogether, and 6 have no siblings, so 10 − 6 = 4 boys have siblings. There are 18 girls, and 9 have no siblings, so 18 − 9 = 9 girls have siblings. Choice A shows these counts and the correct column totals: 13 with siblings and 15 with no siblings.

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