out of 7 boys the average weight of 6 boys is 15 kg. what should be weight of 7th boy, so that their average weight will be 16 kg.
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Answer:
1Kg
Step-by-step explanation:
Weight of all boys = 16 kg
weight of 6 boys = 15kg
weight of each one boy in 15 kg =2kg
weight of 7 boy = 15 kg - 16 kg
= 1 kg
Answer =1kg
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so by mean method
6 boys is 15kg
so 15+x is the weight of class
- 15+x/7=16
- x=97
thus 97 is the weight of 7 boy
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