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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?

Respuesta :

LazyBun
Answer:

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

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