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The average weight of 50 people group is 48kg. There are new 10 peoples added in the group of average weight 45kg. From original group, there are 5 peoples of average weight 50kg are removed. Find the approximate average weight of newly formed group.1. 50 kg2. 47 kg3. 40 kg4. 51 kg5. 43 kg |
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Answer» Correct Answer - Option 2 : 47 kg Given: Total weight of 50 people group = 50 × 48 = 2400 kg Total weight of 10 peoples = 10 × 45 = 450 kg Total weight of 5 peoples = 5 × 50 = 250 kg Total weight of 45 peoples = 2400 - 250 = 2150 kg Total weight of (45 + 10 = 55) peoples = 2150 + 450 = 2600 kg ∴ Average weight of 55 peoples = 2600/55 = 47.27 ≈ 47 kg |
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