In a class of 52 students, the number of boys is two less than the number of girls. The average weight of the boys is 42 kg, while the average weight of all 52 students is 40 kg. What is the approx. the average weight of the girls.
52 طلباء کی کلاس میں لڑکوں کی تعداد لڑکیوں کی تعداد سے دو کم ہے۔ لڑکوں کا اوسط وزن 42 کلو گرام ہے، جب کہ تمام 52 طلباء کا اوسط وزن 40 کلوگرام ہے۔ تقریبا کیا ہے. لڑکیوں کا اوسط وزن
Answer: 38 kg
Explanation
Total students = 52
No. boys = 25
No. girls = 27
Total weight of boys = 42 X 25 = 1050
Total weight of 52 students = 52 X 40 = 2080
Total weight of girls = 2080 - 1050 = 1030
Average weight of girls = 1030 / 27 = 38.15 Kgs
sh25-8-2023
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