The following are the ages (years) of 5 people in a room 14,22,12,25,21 a person enters the room the mean age of 6 people is now 21 what is the age of the person who entered the room

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23-09-2021
Mathematics

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The following are the ages (years) of 5 people in a room 14,22,12,25,21 a person enters the room the mean age of 6 people is now 21 what is the age of the person who entered the room

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TurttlePrincess TurttlePrincess · Answer 1 · 2021-09-23T20:31:33+02:00

Answer: 31 years

Explanation- Since 5 people have a mean age of 30, the sum of their ages is 5⋅30=150. Adding one more person of age 36 to the group gives 6 people with sum of ages 150+36=186. Now divide this by 6 to get the new mean for the group of 6 people: 1866=31 years.

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