The mean age of 5 people in a room is 40 years. A person enters the room. The mean age is now 35. What is the age of the person who entered the room?

Step-by-step explanation:

Hello,

let s note a, b, c, d, e the age of the 5 people

we can say that

So

Now there is another person , let s note his age x

we can write

but we know that a+b+c+d+e = 200 so

x = 210 - 200 = 10

hope this helps

it is not that hard all u have to do is plot the graph

step-by-step explanation: