In a class the averaje weight of 40 students is 35.5 kg. If their average weight along with the class techer is 36 kg. What is ahe weight in kg of ahe class teacher
Answers
Ans is 56 kg
EXPLANATION:-(image)
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Answer:
56 KG
Step-by-step explanation:
AVERAGE = TOTAL ÷ NUMBER
In this case,
Average = Total Weight ÷ No of students
Lets take Total weight as ' X '
Then
35.5 Kg = _____X
40
SO ,
X = 35.5 × 40
= 1420 KG.............(1)
- Total no of people including the teacher = 41
AVERAGE AFTER TEACHER JOINED
= 36
LETS CONSIDER THE NEW TOTAL WEIGHT
as 'Y'
Total weight after teacher joined
= Y
36 = Y
41
Y = 36 ×41 = 1476 KG ...........( 2 )
weight of teacher = 1420-1476
= 56 KG
WEIGHT OF THE TEACHER = 56 KG