3.
Let N be a natural number. We are given a
grouped frequency table, where the
frequencies depend on the number N as
follows:
1-5 6-10 11-15 16-20 21-25 26-30 31-35 36-40 41-45
3N 15N N 2N 3N 6N 10N 8N 2N
Which one of the following about the number
x= Mean - Median is true?
-6<_x<-3

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