- AThree
- BOne
- CNone
- DTwo
Step-by-Step Solution
The final arrangement (top to bottom) is B(7), E(6), A(5), C(4), F(3), G(2), D(1). B is on floor 7 and A on floor 5, so only E on floor 6 lies between them — one person.
Answer: B) One
Seven people A, B, C, D, E, F and G live on seven different floors of a building numbered 1 (bottom) to 7 (top). C lives on floor 4. A lives immediately above C. Exactly two persons live between A and G. B lives on the topmost floor. D lives immediately below G. E lives on a higher floor than F. How many persons live between B and A?
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