The following table shows how me
table shows how much the students of five sections of a class
weigh. How much do they weigh on an average?
Kilograms
39 40 42 42.5 43
Number of students
36 28 30 32 34 Please explain hurry I am on a class
It is Important emegenct
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Answer:
Mean weight of 35 students = 45 kg.
Total weight of 35 students = (45 × 35) kg = 1575 kg.
Mean weight of 35 students and the teacher (45 + 0.5) kg = 45.5 kg.
Total weight of 35 students and the teacher = (45.5 × 36) kg = 1638 kg.
Weight of the teacher = (1638 - 1575) kg = 63 kg.
Hence, the weight of the teacher is 63 kg.
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