The following are the ages (years) of 5 people in a room: 23, 20, 15, 12, 17
A person enters the room.
The mean age of the 6 people is now 19.
What is the age of the person who entered the room?​

27

Step-by-step explanation:

The mean is calculated as

mean =

let x be the age of the person entering the room , then

= 19 ( multiply both sides by 6 )

87 + x = 114 ( subtract 87 from both sides )

x = 27

The age of the person who entered the room is 27

step-by-step explanation:

$450.00 for 6 weeks

or

$300

step-by-step explanation:

$200.00 for first week $50.00 x5 equals $250 plus $200 equals $450.00 for six weeks.

$200 for first week

$200 x 0.10 = $20

$20 x 5 = $100

$200 + $100 = $300