Study the following table and answer the questions. The table shows the…
2024
Study the following table and answer the questions. The table shows the classification of 100 students based on the marks obtained by them in Physics and Chemistry in an examination.
What is the difference between the number of students who scored 30 or more marks in Chemistry and the number of students who scored 30 or more marks in the Aggregate (Average)?
- A.
3
- B.
4
- C.
5
- D.
6
Attempted by 1 students.
Show answer & explanation
Correct answer: D
Concept: A cumulative "X and above" frequency table records, for each subject, how many students scored at least X marks. Because every entry already reports a threshold-or-higher count, comparing two subjects at the SAME cut-off is a direct read-and-subtract from the table — no extra computation is required.
Application: At the 30-and-above row, the table lists 21 students for Chemistry and 27 students for the Average (Aggregate). The required difference is therefore 27 − 21 = 6.
Cross-check: Add the computed difference back to the smaller reading — 21 + 6 = 27 — which matches the table's Aggregate entry at the 30-mark row, confirming the subtraction is correct.