Question

8. If the mean of the following data is 15, find p.

Xi - 5,10,15,20,25
Fi - 6,p,6,10,5​

Answer 1

Total fi = 27 + p

fixi summation is,

= 30 + 10 p + 90 + 200 + 125

= 445 + 10p

now, mean is (445 + 10p) / 27 + p and this value is equal to 8.

so, 8* (27 + p) = 445 + 10p

= 216 + 8p = 445 + 10p

So, 2p = 445 - 216 = 229

So, p = 114.5

Answer 2

Step-by-step explana