Question

The mean age of 5 people in a room is 25 years. A person enters the room. The mean age is now 27. What is the age of the person who entered the room?

Answer 1

Answer:

37 year is right answer

Answer 2

Answer:

31 years

Explanation:

Since 5 people have a mean age of 30, the sum of their ages is

5

⋅

30

=

150

. Adding one more person of age 36 to the group gives 6 people with sum of ages

150

+

36

=

186

. Now divide this by 6 to get the new mean for the group of 6 people:

186

6

=

31

years.