Question

A random sample of 45 students were surveyed to study their preferred city for college. Which of the following inferences is incorrect?

	Grade 9	Grade 10	Grade 11	Grade 12
City A	10	12	11	12
City B	9	7	13	16
City C	12	13	8	12

• A. The least number of students from Grade 9 preferred City B.
• B. Students from Grade 10 preferred City C.
• C. The least number of students from Grade 12 preferred Cities A and C.
• D. Students from Grade 11 preferred City A.

Answer 1

The correct option is D Students from Grade 11 preferred City A.

Option A
In grade 10,
City A = 12, City B = 7, and City C = 13.
13 is the highest number.
$\therefore$ City C has the highest preference.
Thus, option A is correct.

Option B
In grade 9,
City A = 10, City B = 9, and City C = 12.
9 is the lowest number.
$\therefore$ City B has the lowest preference.
Thus, option B is correct.

Option C
In grade 11,
City A = 11, City B = 13, and City C = 8.
13 > 11, 8
13 is the highest number.
$\therefore$ City B has the highest preference.
Thus, option C is incorrect.

Option D
In grade 12,
City A = 12, City B = 16, and City C = 12.
$\therefore$ A lesser number of students preferred City A and City C.
Thus, option D is correct.

From the given options, only option C is incorrect.