Question : The average weight of the first 11 people among 12 people is 95 kg. The weight of the 12th person is 33 kg more than the average weight of all 12 people. The weight of the 12th person is:
Option 1: 128.75 kg
Option 2: 128 kg
Option 3: 131 kg
Option 4: 97.45 kg
Correct Answer: 131 kg
Solution :
Let the average weight of the 12 people be
Then, the weight of the 12th person is
Total weight of all 12 people =
Average weight of all 12 people =
It is given that:
⇒
⇒
⇒
⇒
⇒
⇒
Hence, the correct answer is 131 kg.
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