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Can you write down what the given condition is, in mathematical terms?
That is all I have
Yes, but what is the mean of several numbers in formula?
You see, I'm trying to help you find the solution yourself. Where is the problem — do you know what the mean is?
Oh sorry, the mean means average.
Yes and for some numbers a,b,c, how do you calculate it?
show me how you work it out
So you don't want my help?
yeah i do but can you show me how to work it out
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.
Shine already worked it out but he/she didn't show us how to work it out
I don't understand, what your problem is... Why don't you do what I tell you?
I think you are right because you have the same answer as Shine