Question

Find the median of 34,32,x,x-1,19,15,11 where x is the mean of 10,20,30,40,50.

Answer 1

Mean = sum of observation / no. of .observation
= 10+20+30+40+50 / 5
= 150 / 5 = 30
median = 34 , 32 , x=30, x-1 = 29, 19, 15, 11
in ascending order
Nos. are :- 11, 15, 19, 29, 30, 32, 34
(easiest method )
the middle no. is 29
so, the median = 29

using formula method ( N+1) / 2 th ino.
ie (7+1) / 2 = 4 th no.
4th no is 29
So, the median = 29

Answer 2

Mean x =30
Arrange the data in ascending order,
median of
11,15,19,29,30,32,34
=29