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- anonymous

the mean of 6, 9, and 18 is equal to the mean of 12 and y. What is the value of y ?

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- anonymous

the mean of 6, 9, and 18 is equal to the mean of 12 and y. What is the value of y ?

- katieb

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- nowhereman

Can you write down what the given condition is, in mathematical terms?

- anonymous

That is all I have

- nowhereman

Yes, but what is the mean of several numbers in formula?

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- nowhereman

You see, I'm trying to help you find the solution yourself. Where is the problem — do you know what the mean is?

- anonymous

Oh sorry, the mean means average.

- nowhereman

Yes and for some numbers a,b,c, how do you calculate it?

- anonymous

y=10

- anonymous

show me how you work it out

- nowhereman

So you don't want my help?

- anonymous

yeah i do but can you show me how to work it out

- nowhereman

I can lead you along the path;
First you have to write down those two means as formula. Of course the one for 6,9,18 can imediately be calculated completely.

- anonymous

Shine already worked it out but he/she didn't show us how to work it out

- nowhereman

I don't understand, what your problem is... Why don't you do what I tell you?

- anonymous

Ok

- anonymous

(6+9+18)/3=(12+y)/2=>y=10

- anonymous

I think you are right because you have the same answer as Shine

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