Average weight of 10 people is 70 , one leaves the group and average weight is 69, what is the height
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average weight of 10 people is 70
total .............................10................=70×10=700
avg weight of 9 people is 69
total .......................................=69×9=621
so, weight of that people who left da grp= 700-621=79
total .............................10................=70×10=700
avg weight of 9 people is 69
total .......................................=69×9=621
so, weight of that people who left da grp= 700-621=79
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