Average weight of 30 students of a class is 40kg. If of teacher be included the average increase by 1kg. What is the weight of the teacher?

9th-class-result-2022

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Average weight of 30 students of a class is 40kg. If of teacher be included the average increase by 1kg. What is the weight of the teacher?

Incorrect

61kg

Incorrect

51kg

Incorrect

81kg

Correct

71kg

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