chouky wrote:
hardnstrong wrote:
III no possible values of n because for median to be 235 n has to be greater than 250 and if n is >250 then n cannot be used to determine median
Hope it help
Why not ?
Median is the middle number if set of numbers are odd
or the mean of middle 2 numbers if set of numbers are even
Example - set of 1,2,3,4,5 (median is 3)
se of 1,2,3,4,5,6 (median is 3.5)
In our question here, we have a set of 4 numbers 150,200,250,n
so median is the mean of 2 middle numbers.
III option is if the median could be 235.
For a average 235 atleast one number should be greater than 235
If n is less than 250 and greater than 235, average of 2 mumbers (200 and any number between 235 and 250) can never be 235.
If the n is greater than 250 then median is average of 200 and 250 i.e. 225
Hence 235 can never be the median
Hope this help!!!!!
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