college math
posted by Lourane .
in regard to my question find the median
I put them into numeriacal order as
follows 1400, 1550, 1700, 2500. 7000.
the median should 1700 + 2500
total 4200 divided by 2
equal 2100

The median is the middle number. The median is 1700.
You're thinking of the mean.
http://www.mathsisfun.com/mean.html
http://www.mathsisfun.com/median.html 
If you're talking about the median, then you're missing a number in your list.
Your list is:
1400, 1550, 1700, 2500, 7000
which has 5 numbers.
The median (the middle number) would be the 3rd, which in this case is 1700.
If you want the median to be [(1700 + 2500) / 2] = 2100; then you would need another number that is greater than or equal to 2500 in your list.
e.g.
1400, 1550, 1700, 2500, 2500, 7000
Now your list has 6 numbers and the median would be the average of the 3rd and 4th number (which would equal 2100).
Otherwise your median is 1700.
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