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Question

The following grades are awarded to the students based on the table shown below. Check the stem-leaf plot and choose the correct statement.

Grade Marks
A+
A
A-
B
C
9.0 - 10
8.0 - 9.0
7.0 - 8.0
6.0 - 7.0
5.0 - 6.0
Stem Leaf
5
6
7
8
9
0 3 6 8 9
2 4 6 6 6
5 7 4
0
5 7 8 9

Key: 9|5 = 9.5 marks

A
Seven students received grade A.
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B
Five students have received grade A+.
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C
None of the students have received grade A.
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D
Nine students have received grades A and B.
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Solution

The correct option is D Nine students have received grades A and B.
Let’s check the options one by one.

Option A: Students whose marks are between 9.0 and 10 will receive the grade A+. If we check the last row of the stem, we can see four scores: 95, 97, 98, and 99. This means four students have scored A+. Hence, option A is incorrect.

Option B: Students whose marks are between 7.0 and 8.0 will receive the grade A-, and the students whose marks are between 6.0 and 7.0 will receive grade B. If we check the second and third rows of the stem, we can see nine scores: 62, 64, 66, 66, 66, 73, 74, and 74. Hence, option B is correct.

Option C: If we check the fourth row of the stem, one student has scored 80 marks. Hence, option C is incorrect.

Option D: The third row of the stem shows that three students have scored marks between 7.0 and 8.0. Hence, option D is incorrect.

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