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Q:

The average age of a class of 40 students and a teacher reduces by 0.5 years, if we exclude the teacher. If the initial average age is 18 years, then what is the age of the teacher?

  • 1
    38 years
  • 2
    40 years
  • 3
    39 years
  • 4
    41 years
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Answer : 1. "38 years"
Explanation :

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