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What was the average weight of all the persons in the colony? Statement I: There are total 40 persons in the colony. Statement II: If 3 persons whose average weight is 56.5 kg left the colony and 3 new persons whose total weight is 137.5 kg joined the colony then the average weight of all the persons in the colony decreases by 0.8 kg. 

What was the average weight of all the persons in the colony? Statement I: There are total 40 persons in the colony. Statement II: If 3 persons whose average weight is 56.5 kg left the colony and 3 new persons whose total weight is 137.5 kg joined the colony then the average weight of all the persons in the colony decreases by 0.8 kg.  Correct Answer Both Statements I and II together are not sufficient to answer the question.

Suppose average weight of all the persons in the colony is ‘x’ kg.

Statement I and II:

40x – 56.5 × 3 + 137.5 = (x – 0.8) × 40

⇒ 40x – 32 = 40x – 32

Value of x can’t be calculated from this.

∴ Both Statements I and II together are not sufficient to answer the question.

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