30 26 25 11 34 20 26 26
1) arrange the numbers in ascending order:
11, 20, 25,26,26,26,30,34 [ number of terms are 8 i,e even ]
median = average of middle terms { middle terms are 26, 26 }
= (26 + 26)/2
= 52 /2
= 26
2) mode:
If an observation occur more frequently in the data is called mode.
mode = 26