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 of the following Class is held on 3 consecutive days?
1. Chemistry, Geography, History
2. English, History, Chemistry
3. English, History, Geography
- A.
Only I
- B.
Only II
- C.
Only III
- D.
All I, II and III
Attempted by 11 students.
Show answer & explanation
Correct answer: A
Answer: Only the group Chemistry, Geography and History are held on three consecutive days, so the correct choice is the one that states only that triple.
Given: English is on Sunday.
Hindi is held after both Maths and Biology (so Hindi occurs later than both of those classes).
History, Geography and Chemistry occupy three consecutive days, although their order among those three is not specified.
Evaluate each listed triple:
Chemistry, Geography, History: This is exactly the set of three subjects stated to be on consecutive days, so this triple does occur on three consecutive days.
English, History, Chemistry: English is fixed on Sunday and is not part of the consecutive trio; therefore this triple does not represent three consecutive days.
English, History, Geography: For the same reason as above, English is not in the consecutive trio, so this triple is not three consecutive days.
Conclusion: Only the triple Chemistry, Geography and History occurs on three consecutive days; the other listed triples do not.