there are 3 groups A,B,C with 22,18 and 10 students the mean weight of combined set of 50 students is found to be 47.6 kg if mean weight of groups A and B are 40 kg and 50 kg find mean weight of C
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Mean weight of 50 students = 47.6
Total weight of 50 students = 2380
Total weight of 22 students = 40×22= 880
Total weight of 18 students = 50 × 18 = 900
Weight of remaining 10 students = 600
Mean weight of group c = 600 ÷ 10 = 60
Total weight of 50 students = 2380
Total weight of 22 students = 40×22= 880
Total weight of 18 students = 50 × 18 = 900
Weight of remaining 10 students = 600
Mean weight of group c = 600 ÷ 10 = 60
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4
Answer:
60 kg weight of C group
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