In a class of 80 students, 45 study Maths, 40 study Physics, and 15 study both. How many study exactly one subject? MCQ with Answer and Explanation

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In a class of 80 students, 45 study Maths, 40 study Physics, and 15 study both. How many study exactly one subject?

A. 65

B. 55

C. 60

D. 50

Answer: Option B

Solution (By JKSSB Mock Tests)

Only Maths = 45−15=30; only Physics = 40−15=25. Exactly one = 30+25=55.

This question belongs to: Reasoning Logical Reasoning

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Question #1

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If 'BOOK' is coded as 'CPPL', then 'NOTE' is coded as ?

A. NQTE

B. OPVE

C. OPUF

D. OQVF

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Correct Answer: Option C

Explanation:
Each letter is shifted one place forward: N→O, O→P, T→U, E→F = OPUF.

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Question #2

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If 'BAT' = 23, then 'DOG' = ?

A. 27

B. 25

C. 26

D. 24

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Correct Answer: Option C

Explanation:
BAT = 2+1+20=23. DOG = 4+15+7=26.

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Question #3

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A person walks 4 km towards West, then turns to his right to travel 9 km. He then turns left and travels 4 km. In which direction is he from the starting point?

A. South

B. West

C. North

D. East

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Correct Answer: Option C

Explanation:
West 4, right North 9, left West 4. Net West 8, North 9. Direction North-West but closest North among pure, or the net is North of start primarily? Distance more North, but option pure North not exact. Actual position North-West.

This question belongs to: Reasoning Logical Reasoning

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