1.

The mean weight of 12 person?s increased by 2.5 kg when a new person comes in place of hem by replacing a person whose weight is 68 kg. the weight of the new person is:

A. 78 kg                                                                
B. 88 kg             
C. 98 kg   
D. 75 kg
E. None of these
Answer» D. 75 kg


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