The average weight of a class of 115 students is 52.4 kg.
The average weight of a class of 115 students is 52.4 kg. If the average weight of the 63 boys is 60 kg, then find the average weight (in kg) of the girls in the class.(Rounded off to one decimal place)
115 विद्यार्थियों की एक कक्षा का औसत वजन 52.4 है। यदि 63 लड़कों का औसत वजन 60 kg है, तो कक्षा में लड़कियों का औसत वजन (kg में) ज्ञात करें। (दशमलव के बाद एक स्थान तक पूर्णांकित।)
Detailed Solution & Logic
Correct Answer:
43.2
Total students} = 115
Average weight of class = 52.4 kg $
Total weight of class = $ 115 \times 52.4 = 6026 kg $
Number of boys = 63, Average weight of boys = 60 kg
Total weight of boys = $ 63 \times 60 = 3780 $ kg
Number of girls= 115 - 63 = 52
Total weight of girls = 6026 - 3780 = 2246 kg
Average weight of girls = $ \frac{2246}{52} 43.2 kg$
Answer = 43.2 kg
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