Question
Download Solution PDFIn a class of 60 students, 20 are girls. The average weight of the boys in the class is 40 kg, while that of all the girls is 35 kg. What is the average weight (in kg) of the entire class (correct to two decimal places)?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven
Total students in the class = 60
Girls = 20
The average weight of the boys = 40 kg
The average weight of the girls = 35 kg
Formula used:
Average = sum of values/total values
Calculation
Let the average weight (in kg) of the entire class be x.
Sum of weight of all boys = 40 × 40 = 1600
Sum of weight of all girls = 20 × 35 = 700
The sum of weight of all classes = 60x
⇒ 60x = 1600 + 700
⇒ 60x = 2300
⇒ x = 38.33 kg
The average weight (in kg) of the entire class is 38.33 kg
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