MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Arithmetic Mean

The average w...

Question

The average weight of 20 students is 60kg.If the weight of the teacher is added, average is increased by 2kg.What was the teachers weight

Open in App

Solution

The average wight of $20$ students is $60 k g$
$∴$ Total weight of $20$ students $= 20 \times 60 = 1200 k g$
When the teacher is added then average is increased by $2 k g$ .
$∴$ Average weight of $20$ students and $1$ teacher people becomes $62 k g$
$\Rightarrow$ Total weight of $20$ students and $1$ teacher $= 21 \times 62 = 1302 k g$
$∴$ The required weight of teacher $= (1302 - 1200) k g = 120 k g$

Suggest Corrections

thumbs-up

1

Similar questions

Q. The average weight of a class of 24 students is 35 kg. If the weight of the teacher be included, the average rises by 400g. The weight of the teacher is

Q. Choose the correct answer from the alternatives given :
The average weight of 40 students is 45 kg. If the teacher is included and one student is excluded, the average weight increases by 1 kg. If the weight of excluded student is 40 kg, the weight of the teacher is:

Q. The average weight of students in a class of 35 students is 40 kg. If the weight of the teacher be included, the average rises by

\frac{1}{2}

kg, the weight of the teacher is

Q. The average weight of 21 boys was recorded as 64 kg. If the weight of the teacher was added, the average increased by 1 kg. What was the teacher's weight?

Q. In a class, a student is replaced by a teacher and the average is increased by

\frac{3}{4}

kg. If total students were

60

and the average weight of the students were

40

kg, find the weight of the teacher.

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Arithmetic Progression

MATHEMATICS

Watch in App

explore_more_icon

Explore more

Arithmetic Mean

Standard XII Mathematics

Join BYJU'S Learning Program

CrossIcon