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HACTEHA [7]
3 years ago
12

The mean age of 5 people in a room is 40 years. A person enters the room. The mean age is now 40. What is the age of the person

who entered the room?
Mathematics
1 answer:
ad-work [718]3 years ago
6 0

Answer:

40

Step-by-step explanation:

5 people in the room have  5*40 = 200 years altogether

a new person is X years old.

Now 6 people have (200 + x) years altogether.

Mean age of 6 people  is (200+x)/6. and it is also = 40.

So,

(200+x)/6 = 40

200 + x = 240

x = 40

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