Find the value of f, if the mean of the following distribution is 25.2 : class interval 0-10, 10-20,20-30,30-40,40-50 f 8,12,f, 11,9?
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so I think that the answer might be this..
hope this helps!!!!
hope this helps!!!!
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vandna3:
sorry their is a multiplication mistake in the answer due to which whole answer ia wrong...
so the answer is not right at all
Answered by
0
Answer:
Solution - 12
Step-by-step explanation:
C.I 0-10 10-20 20-30 30-40 40-50
Frequency 8 X 10 11 9.
Midvalue 5 15 25 35 45
Mean = 25.2
8+x+10+11+9
8×5+15x+10×25+11×35+9×45
=25.2
1080+15x=957.6+25.2x
x=
10.2
122.4
x=12.
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