Discussion
Consider the following bar graph which represents the grade of the students:
| Grade | Numberf of Students |
|---|---|
| Withdrew | 8 |
| F | 4 |
| D | 8 |
| C | 6 |
| B | 19 |
| A | 3 |
| 1. | Number of students who withdrew = 8 | Number of students having grade D = 8 | Number of students having grade A = 4 |
| 2. | Number of students who withdrew = 8 | Number of students having grade D = 8 | Number of students having grade A = 3 |
| 3. | Number of students who withdrew = 8 | Number of students having grade C = 8 | Number of students having grade A = 3 |
In how many of the above rows is the given information correctly tabulated?
Answer: A
The information is correct in only one row.
Reading the bars: Withdrew 8, F 4, D 8, C 6, B 19 and A 3.
- Row 1 gives grade A as 4; the bar is 3 (4 is the F bar). Wrong.
- Row 2: withdrew 8, grade D 8, grade A 3. All correct.
- Row 3 gives grade C as 8; the bar is 6. Wrong.
So only row 2 is fully correct. Each wrong row changes one value, which is why every entry, not just the first, has to be checked.
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