- Option : B
- Explanation : Case I:
Criminals P Q R S Assumption F T F F Result Q _{NC}S _{C}R _{C}S _{C}

S and R are criminal in the result is impossible because only one person committed the crime.

Case II:Criminals P Q R S Assumption T F F F Result Q _{C}S _{NC}R _{C}S _{C}

Q and R are criminal in the result is impossible because only one person committed the crime.

Case III:Criminals P Q R S Assumption F F T F Result Q _{NC}S _{NC}R _{NC}S _{C}

S_{NC}and S_{C}in the result which is contradiction. [S committed crime and same time not committed crime which is contradiction]

Case IV:Criminals P Q R S Assumption F F F T Result Q _{NC}S _{NC}R _{C}S _{NC}

R is criminal in the result.

Hence this case satisfies only one person committed the crime.

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- Option : C
- Explanation :

Percentage of Administrators = (Administrator/Total) x 100

=(50/60) x 100 = 31.25

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- Option : C
- Explanation :

Total number of students = 60 + 80 + 30 + 38 + 5 + 10 + 2 = 225

25% = 225

100% = (225/25) x 100 = 900

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- Option : D
- Explanation :

In all other option except D, Z is not staying in south-west wing. Since Z believe in vastu, he can stay in Any of the south-west wings but not in any other wing. In option (D) X is away from the garden as well as Y is away from the washroom. So, option (D) is correct.

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