Question

The following are the ages (years) of 5 people in a room:

13, 13, 19, 23,19
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?

Answer 1

Answer:Answer:

the added person age is 26

Explanation:

let the added person age is A

the six person mean is (23+19+12+21+13+A)/6=19

=> 88+A/6=19

=>A=(19×6)-88

there fore A=26

Answer 2

39

Explanation:

13 + 13 + 19 + 23 + 19 + x = 21

6

Combine like terms

(87 + x) / 6 = 21 Multiply both sides by 6

(87 + x ) = 21 * 6

87 + x = 126 Subtract 87 from both sides

x = 126 - 87

x = 39

The 6th person entering the room was 39