Question

The average age of 35 boys is 13 years. One more boy joins but the average age remains 13 years. Find the age of the new boy.​

Answer 1

Answer:

13+x/2=13

13+x=13×2

13+x=26

x=26-13=13 years is the answer

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Answer 2

Answer:

13 years

Step-by-step explanation:

if average age is 13 of 35 boys then,

let the sum of the ages of boys be x

now, x/35=13

so, x=455

now let the age of new one be y

then, x+y/35+1= 13

so, now put the value of x

455+y/36= 13

=. 455+y= 13+36

=. y= 468-455

=. y=13

age of the new boy is 13 years

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