the average weight of 25 students is 16 kg.the average weight of the first 12 students is 14 kg and of the last 12 students is 17 kg find the weight of the 13th student
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Answer:
Total weight of 29 students =29×40=1160 kg
total weight of student and teacher =30×40.5=1215 kg
weight of teacher = 1215-1160=55 kg
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Step-by-step explanation:
Given:
Total number of students = 25.
Average weight of students = 16 kg.
The average weight of the first 12 students is = 14 kg.
The average weight of the last 12 students is =17 kg.
Calculation:
Total weight of students = 25 × 16 kg = 400 kg.
The total weight of the first 12 students is = 12 x 14 kg = 168 kg.
The total weight of the last 12 students is = 12 x 17 kg = 204 kg.
The weight of the 13th student = 400 - 168 - 204 = 28 kg.
∴ The weight of the 13th student = 28 kg.
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