The average weight of a group of 10 people increases by 1 kg when one of them weighing 58 kgs is replaced by a new person. the weight of the new person is -
Answers
Answered by
14
Let average weight be x kg
Total weight = 10x kg
.
New total weight = 10x - 58 + new
New average = x + 1
average = total weight/no. of person
x + 1 = ( 10x - 58 + new )/10
10x + 10 = 10x - 58 + new
10 = new -58
new = 58 + 10
= 68 kg
hope it helped.
Total weight = 10x kg
.
New total weight = 10x - 58 + new
New average = x + 1
average = total weight/no. of person
x + 1 = ( 10x - 58 + new )/10
10x + 10 = 10x - 58 + new
10 = new -58
new = 58 + 10
= 68 kg
hope it helped.
Answered by
0
Answer:
68 Kg
Step-by-step explanation:
LET Average weight be x Kg
Total weight =10×Kg
New total weight=10x-58+new
new average=x+1
average=total weight/no of person
x+1=(10×-58+new)/10
10x+10=10x-58+new.
10=new-58
new=58+10
=68kg
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