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Contra-Positive Method of Validation

T is heavier ...

Question

T is heavier than which of the following two articles ?

A

S,Q

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B

S,R

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C

P,R

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D

P,Q

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Solution

The correct option is A S,R
Let R's weight be $x$ .
Then, S's weight $= 2 x$ , T's weight $= 4 x$ and Q's weight $= 4.5 x$ and P's weight $= 9 x$ .
Clearly, P is heaviest of all.
Hence, option (B) is the correct answer.

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