The average weight of 35 students in a class is 40kg. If the weight of the teacher is also included, the average rises by 0.5 kg. The weight of the teacher is

40.5 kg

No worries! We‘ve got your back. Try BYJU‘S free classes today!

50 kg

No worries! We‘ve got your back. Try BYJU‘S free classes today!

58 kg

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

64 kg

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C
58 kg

Average weight = $\frac{s u m o f w e i g h t o f s t u d e n t s}{35} = 40 k g$
Sum of the weight of the students = $40 \times 35 = 1400 k g$
Let the teachers weight be 'w'.
New average weight= $\frac{1400 + w}{36} = 40.5 k g$
$\Rightarrow w = 40.5 \times 36 - 1400 = 1458 - 1400 = 58 k g$

Suggest Corrections

Similar questions

Q. The average weight of 35 students in a class is 40kg. If the weight of the teacher is also included, the average rises by 0.5 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

The average weight of a class of 25 students is 34 kg. If the weight of their maths teacher is included, the average rises by 400 g. The weight of the teacher is

Q. The average weight of

25

students of grade

7

40 kg

. If the weight of teacher is included, then the average weight becomes

41.5 kg

. Find the weight of the teacher.

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:

Join BYJU'S Learning Program

The average weight of 35 students in a class is 40kg. If the weight of the teacher is also included, the average rises by 0.5 kg. The weight of the teacher is

The correct option is C 58 kg Average weight = sumofweightofstudents35=40 kg Sum of the weight of the students = 40×35=1400 kg Let the teachers weight be 'w'. New average weight= 1400+w36=40.5 kg ⇒w=40.5×36−1400=1458−1400=58 kg