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21. The mean weight of 4 boys is 56 kg and that of 6 girls in 46 kg. Find the combinedmean weight of 10 students.

Answer»

Mean weight of 4 boys = 56 kg

Weight of 4 boys = 56 (4) = 224

Mean weight of 6 girls = 46 kg

Weight of 6 girls = 46 (6) = 276

Total weight = 224 + 276

= 500

Average weight = 500/10 = 50 kg



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