22. If the mean of the following distribution is 50.5, find the val
CLASS 0-20 20-40 40-60 60-80 80-100
FREQUENCY : 5 9 12 x 6
Answers
Answer:
Mean=5+9+12+x+6/5
50.5=32+x /5. x= 92.5
The value of is 8
Step-by-step explanation:
Class Frequency mid value Fx
0-20 5 10 50
20-40 9 30 270
40-60 12 50 600
60-80 x 70 70x
80-100 6 90 540
..........................................................................................................
We know mean =
or
or
or
or
or
or
Therefore the value of is 8