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For his exams, Charlie has to study for 4 papers - Statistics, Mathematics, Economics and Foundation Course. He is left with 5 days from Tuesday to Saturday to prepare for his exams. He goes to the library and studies from 10 a.m. to 4 p.m. He has to make a time table such that:
  1. He gets to study Statistics on all 5 days from 10 a.m. to 12 p.m. everyday or 2 p.m. to 4 p.m.everyday.
  2. He studies Mathematics on Tuesday, Thursday and Saturday from 10.30 a.m. to 12.30 a.m. or on Wednesday and Friday from 1 p.m. to 4 p.m.
  3. He can study Economics on Tuesday and Thursday from 12.30 p.m. to 2.30 p.m. or on Wednesday and Friday from 10 a.m. to 12 p.m.
  4. He studies Foundation Course from 12 p.m. to 2 p.m. for 2 hour sessions on two days or on only 1 day for 4 hours.
  5. He can study one subject at a time and he has to maximize his studying hours.
  6. He can choose only one of the above mentioned studying hours for all subject throughout the week.
Q. If Charlie studies Foundation Course for 4 hours on the same day, which subject does he 3 study on Thursday other than Statistics?
  • a)
    Mathematics
  • b)
    Economics
  • c)
    Foundation Course
  • d)
    Cannot be determined
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
For his exams, Charlie has to study for 4 papers - Statistics, Mathema...
Considering solution to the first question of the set, he studies Economics on Thursday.
Hence, option 2.
This question is part of UPSC exam. View all CAT courses
Most Upvoted Answer
For his exams, Charlie has to study for 4 papers - Statistics, Mathema...
Analysis:

Given Conditions:
- Charlie studies Statistics on all 5 days either from 10 a.m. to 12 p.m. or from 2 p.m. to 4 p.m.
- Mathematics is studied on Tuesday, Thursday, and Saturday from 10.30 a.m. to 12.30 a.m. or on Wednesday and Friday from 1 p.m. to 4 p.m.
- Economics is studied on Tuesday and Thursday from 12.30 p.m. to 2.30 p.m. or on Wednesday and Friday from 10 a.m. to 12 p.m.
- Foundation Course is studied for 4 hours on the same day.

Solution:
- Since Charlie studies Foundation Course for 4 hours on the same day, it means he studies Foundation Course on that day.
- He cannot study Statistics on that day as he can only study one subject at a time.
- Therefore, on Thursday, Charlie will study Economics other than Statistics.
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He is left with 5 days from Tuesday to Saturday to prepare for his exams. He goes to the library and studies from 10 a.m. to 4 p.m. He has to make a time table such that: He gets to study Statistics on all 5 days from 10 a.m. to 12 p.m. everyday or 2 p.m. to 4 p.m.everyday. He studies Mathematics on Tuesday, Thursday and Saturday from 10.30 a.m. to 12.30 a.m. or on Wednesday and Friday from 1 p.m. to 4 p.m. He can study Economics on Tuesday and Thursday from 12.30 p.m. to 2.30 p.m. or on Wednesday and Friday from 10 a.m. to 12 p.m. He studies Foundation Course from 12 p.m. to 2 p.m. for 2 hour sessions on two days or on only 1 day for 4 hours. He can study one subject at a time and he has to maximize his studying hours. He can choose only one of the above mentioned studying hours for all subject throughout the week.Q. 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