The following are the ages (years) of 5 people in a room: 22 , 13 , 17 , 15 , 17 A person enters the room. The mean age of the 6 people is now 17. What is the age of the person who entered the room?
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Answer:
18 years of age
Step-by-step explanation:
Since 22 + 13 + 17 + 5 + 7 is 84
We do this to find the total sum.
We subtract it from 6 times 17, which is 102.
We do this to figure out the total sum of the 6 numbers, as a mean is the total sum of numbers divided by how many, so the total sum is 104.
so 102 minus 84 = 18.
We do this because we want to find the age of the person added to the group. Hence 102 minus 84
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