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Mathematics 15 Online
OpenStudy (anonymous):

easy medal and fan! please help!! The mean age of 10 people in a room was 16. When Toby walked into the room, the mean age went up to 18. What is Toby's age?

OpenStudy (anonymous):

9

OpenStudy (anonymous):

9

OpenStudy (anonymous):

2 years old ?

OpenStudy (anonymous):

.....

OpenStudy (anonymous):

9

OpenStudy (anonymous):

lol 9 isn't an option

OpenStudy (anonymous):

2

OpenStudy (anonymous):

nopeeeeee thats not an option either okie

OpenStudy (anonymous):

what are the options

OpenStudy (anonymous):

18, 20, 22, 34, 38

OpenStudy (anonymous):

mean is like average right? so its saying that the average age went up because he was older than the other people, im just not sure how to find out how old

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