Question

The average weight of 30 students in a class is 25 kgs. If the weight of the class teacher is added, the average weight increase by 2 kgs. The weight of the class teacher is ?



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Answer 1

$\bf{ \underline{Given:}}$

• The average weight of 30 students in a class is 25 kg
• And we added 2 kg of teacher's weight to it.

$\bf{ \underline{To \: find :}}$

• The weight of the class teacher is ?

$\bf{ \underline{Solution ↷}}$ㅤㅤ

$\bf➥{ \underline{ \green{According \: to \: the \: question}}}$

↛Average weight of 30 students = 25 Kg

↛Sum of the weight of 30 students = 30 × 25 = 750 Kg

✩ If the class teacher included the average is increased by 2 Kg

↛∴ Average weight of 30 students and teacher = 27 Kg

↛∴ Sum of weight = 31 × 27 = 837 Kg

↛∴ Class teacher weight = 837 - 750

ㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤ = 87 Kg

$★ \bf{ \red{ \underline{Thus, \: the \: weight \: of \: class \: teacher \: is { \boxed{87 Kg}}}}}★$

Answer 2

Answer:

Given:

The average weight of 30 students in a class is 25 kg

And we added 2 kg of teacher's weight to it.

To find:

The weight of the class teacher is ?

Solution↷

ㅤㅤ

$➥{ \underline{ \green{According \: to \: the \: question}}}➥$

↛Average weight of 30 students = 25 Kg

↛Sum of the weight of 30 students = 30 × 25 = 750 Kg

✩ If the class teacher included the average is increased by 2 Kg

↛∴ Average weight of 30 students and teacher = 27 Kg

↛∴ Sum of weight = 31 × 27 = 837 Kg

↛∴ Class teacher weight = 837 - 750

ㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤ = 87 Kg