The Average weight of a class of 29 Student is 40 kg .if the weight of the teacher be include .the average rises be 500gm . What is the weight of the teacher
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♣️♣️Solution:-♣️♣️
The average weight of 29 students is 40kg.
Total weight=40*29=1160
↪Now as the teacher joins total =29+1=30
➡️And the average rises up by 500grams
⏩So new total weight=30*40.5=1215
➡️Weight of teacher = Weight of 30(teacer+students)-Weight of 29students
↪i.e 1215–1160=55.
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Total number of students = 29
Average weight of students = 40 kg
Average = weight of students
number of students
40 = weight of students
29
Weight of students = 40 × 29
= 1160 kg
When teachers weight is added,
new Average = 40 + 0.500 = 40.5kg
number of people = number of students + teacher
= 29 + 1 = 30
new Average = weight of students + weight of teacher
number of people
40.5 = 1160 + weight of teacher
30
40.5 × 30 = 1160 + weight of teacher
1215 = 1160 + weight of teacher
weight of teacher = 1215 - 1160
= 55
Weight of teacher = 55 years
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