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24 students of a class have a mean weight of 40 kg. When their teacher's weight is also counted, the mean rises by 1 kg. How heavy is the teacher, in kg?

Competition practiceAverages & Ages
  • A65
  • B64
  • C41
  • D66

Step-by-Step Solution

Total for 24 students = kg. With the teacher: kg. Teacher = 1025 − 960 = 65 kg.
Answer: A) 65

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