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  1. The average weight of first 11 persons among 12 persons is 95 kg. The weight of 12th person is 33 kg more than the average weight of all the 12 persons. The weight of the 12th person is
    1. 128.75 kg
    2. 128 kg
    3. 131 kg
    4. 97.45 kg
Correct Option: C

Let Weight of 12th person = w kg

∴ Average weight of 12 persons =
11 × 95 + w
kg
12

According to the question,
⇒ w =
11 × 95 + w
+ 33 = w
12

⇒ 1045 + w + 396 = 12w
⇒ 1441 = 11w
⇒ w =1441/11 = 131 kg.



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