Question

Q6 If the mean of following distribution is 26.2, then find the value of f.
Classes. Frequency
0-10. 10
10-20. 12
20-30. 5
30-40. f
40-50. 15
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Answer 1

Answer:

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Answer 2

Answer:

Sum of fi =42+f

and

sum of fixi =1030+35f

Means= sum of fixi / sum of fi

1030+35f/42+f=26.2

1030+35f=1100.4+26.2f

35f-26.2f =1100.4-1030

8.8f=70.4

f=8

Hence the value of f is 8