312,796 views
37 votes
37 votes
the average of a class of 25 students is 12 years. if a boy is leave the class the average age of the class falls down to 11.8 75. find the age of the boy who left the class.​

User Gandreadis
by
2.4k points

2 Answers

22 votes
22 votes

Answer:

16 years is the answer

Explanation:

My account got deactivated I am about to cry

User La Muerte Peluda
by
2.6k points
23 votes
23 votes

ANSWER

solution

here,

Correct option is B)

Total age of 40 old students =40×15=600years.

Total age of 40 old and 10 new students =50×15.2=760years

∴ Total age of 10 new students =760−600=160years

∴ Required average age =

10

160

=16years

User Gray
by
3.0k points