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The following are the ages (years) of 5 people in a room: 18, 25, 18, 21, 16 A person enters the room. The mean age of the 6 people is now 25. What is the age of the person who entered the room?
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The following are the ages (years) of 5 people in a room:

18, 25, 18, 21, 16
A person enters the room.
The mean age of the 6 people is now 25.
What is the age of the person who entered the room?

User PereG
by
4.6k points

1 Answer

4 votes
Answer:

Step-by-step explanation:

Let x be the age of the person who enter the room

(18 + 25 + 18 + 21 + 16 + x)/6 = 25
(77 + x)/6 = 25
77 + x = 25(6)
77 + x = 150
x = 150 - 77
x = 73
User Stexcec
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