Question

The mean of following data is 14. Find the value of K!
x 5. 10. 15. 20. 25
f 7. K. 8. 4. 5

Answer 1

Answer:

Σfixi = (360 + 10k) ,Σfi = (24 + k )

MEAN = Σfixi / Σfi

Given : Mean = 14

14 = (360 + 10k) / (24 + k )

14 × (24 + k ) = (360 + 10k)

336 + 14k = (360 + 10k)

14k - 10k = 360 - 336

4k = 24

k = 24/4 = 6

k = 6

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