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11) The mean weight of 8 students is 455 kg. Two more students having weights 41.7 kgand 53.3 kg join the group. What is the new mean weight?

Answer»

Mean weight of 8 students = 45.5 kg

Total weight of 8 students= mean weight * no. Of students= 45.5*8 = 364

Total weight of 10 students= 364 + 41.7 + 53.3 = 459

Mean weight of 10 students= 459/10 = 45.9 kg



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