Question

The average weight of 10 men increased by 1.5 kg when one of the men who weighs 68 kg was replaced by a new man. Find the weight of the new man.

Answer 1

let the average weight of 10 men be x
then the total weight of 10 men will be 10x
the average weight of 10 men after replacing the men will be x+1.5
therefore total weight after replacing ten men will be 10(x+1.5)
let the weight of new men be y
 
now ,acording to the question,
10x-68+y=10(x+1.5)
10x-68+y=10x+15
y=83 kg
the weight of new man is 83 kg ans

Answer 2

Answer:

let the average weight of 10 men be x

then the total weight of 10 men will be 10x

the average weight of 10 men after replacing the men will be x+1.5

therefore total weight after replacing ten men will be 10(x+1.5)

let the weight of new men be y

 

now ,acording to the question,

10x-68+y=10(x+1.5)

10x-68+y=10x+15

y=83 kg

the weight of new man is 83 kg ans

Step-by-step explanation: