Question

The following are the ages (years) of 5 people in a room: 12, 21, 25, 18, 13 A person enters the room. The mean age of the 6 people is now 21. What is the age of the person who entered the room?

Answer 1

Answer:

31 years

Step-by-step 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.

Answer 2

Answer:

Step-by-step explanation:

Sorry I can't answer