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The following are the ages (years) of 5 people in a room: 14 , 24 , 24 , 20 , 24 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?
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19 votes
The following are the ages (years) of 5 people in a room:

14
,


24
,


24
,


20
,


24


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?

User Mbouzahir
by
3.7k points

1 Answer

7 votes

Answer:

20

Explanation:


(14 + 20 + 24 + 24 + 24 + x) / 6 = 21 \\ 106 + x = 126 \\ x = 126 - 106 = 20

User Huron
by
3.6k points
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