- (A) 56
- (B) 57
- (C) 58
- (D) 59
_______ is considered the largest glacier of Pakistan.
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- (A) Siachen Glacier
- (B) Tirich Mir Glacier
- (C) Biafo Glacier
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When a student weighing 45 kg left a class, the average weight of the remaining 59 students increased by 200 g. What is the average weight of the remaining 59 students?
When a student weighing 45 kg left a class, the average weight of the remaining 59 students increased by 200 g. What is the average weight of the remaining 59 students?
- Solution: Increase in average = 200 g = 0.2 kg
- Number of remaining students = 59
- Weight of the student who left = 45 kg
- Formula:
- Weight of the student who left = New average - Increase x Number remaining
- Intuitive formula:
- New average = Weight of the student who left + Increase x Number remaining
- x = 45 + (0.2 x 59)
- = 45 + 11.8
- = 56.8 ≈ 57
- Answer: 57 (B)
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