Comprehension

Seven boys P, Q, R, S, T, U and X have different weights. X is heavier than Q. P is heavier than only three people. Q is heavier than P. T is heavier than S but lighter than R. U is heavier than R but lighter than Q.

How many boys are lighter than U?

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  1. Five
  2. Four
  3. Two
  4. Three
  5. None of these

Answer (Detailed Solution Below)

Option 2 : Four
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Detailed Solution

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From the given instructions:

1) X is heavier than Q. Q is heavier than P. P is heavier than only three people. So, we have two cases;

Case 1:

X/ > X/ > Q > P > __ > __ > __

Case 2:

X > Q > __ > P > __ > __ > __

2) T is heavier than S but lighter than R. U is heavier than R but lighter than Q. So, Case 1 is invalid.

So, Final Arrangement,

XQ > U P > R > T > S

Hence, four boys are lighter than U.

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