In a school there are 7 subjects in class Xth. Each subject is taught on seven…
2024
In a school there are 7 subjects in class Xth. Each subject is taught on seven different days of the week. The subjects are English, Hindi, Maths, Biology, History, Geography, and Chemistry. English class is held on Sunday. Hindi class is held after maths and biology class. History, Geography and Chemistry class is held on consecutive days, however not in same order.
Which statement is true?
- A.
A.Hindi class is held after Geography class
- B.
A.English, History, and Chemistry class is held on consecutive days
- C.
A.The chemistry class can be held latest by Saturday
- D.
A.There is no class on Monday
Attempted by 4 students.
Show answer & explanation
Correct answer: C
Key facts: English is on Sunday; History, Geography, and Chemistry are on three consecutive days (in some order); Hindi is scheduled after both Maths and Biology.
Because English is on Sunday, the other six subjects must occupy Monday–Saturday.
The three consecutive subjects (History, Geography, Chemistry) must form a block somewhere within Monday–Saturday, so Chemistry cannot be on Sunday and at the latest can be on Saturday (if it is the last day of that block).
Hindi must come after both Maths and Biology, but this does not determine its relation with Geography; Geography could be scheduled either before or after Hindi depending on the arrangement of subjects.
Evaluation of the given statements:
Statement 'Hindi class is held after Geography class': Not necessarily true. Counterexample schedule: English (Sunday), Maths (Monday), Biology (Tuesday), Hindi (Wednesday), History (Thursday), Geography (Friday), Chemistry (Saturday). Here Hindi occurs before Geography, so the statement is not guaranteed.
Statement 'English, History, and Chemistry class is held on consecutive days': False. The consecutive three are History, Geography, and Chemistry, so English (fixed on Sunday) is not part of that consecutive block.
Statement 'The chemistry class can be held latest by Saturday': True. Since the three-day block containing Chemistry must fit within Monday–Saturday, the latest day Chemistry can occupy is Saturday (if Chemistry is the last day of that block).
Statement 'There is no class on Monday': False. There are seven subjects taught on seven different days, so every day (including Monday) has a class.
Conclusion: The correct statement is: the chemistry class can be held latest by Saturday.