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Question

In a Mathematics test, the following marks were obtained by 40 students. Arrange these marks in a table using tally marks.

8

1

3

7

6

5

5

4

4

2

4

9

5

3

7

1

6

5

2

7

7

3

8

4

2

8

9

5

8

6

7

4

5

6

9

6

4

4

6

6

(a) Find how many students obtained marks equal to or more than7.

(b) How many students obtained marks below 4?

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Solution

By observing the marks scored by 40 students in the test, we can construct the

table as follows.

Mark

Tally mark

Number of Students

1

2

2

3

3

3

4

7

5

6

6

7

7

5

8

4

9

3

(a) The students who obtained their marks equal to or more than 7 are the students who obtained their marks as either of 7, 8, and 9. Hence, number of these students = 5 + 4 + 3 = 12

(b) The students who obtained their marks below 4 are the students who

obtained their marks as either of 1, 2, and 3.

Hence, number of these students = 2 + 3 + 3 = 8


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