Question

if the mean distribution is 25 class interval is :0-10,10-20,20-30,30-40,40-50 & frequency is 5,18,15,P,6 find the value of p ​

Answer 1

Hope it may help you...

Answer 2

Answer:

mean = ∑fx/∑f

∑fx = 25 + 270 + 375 + 35p + 270 = 940 + 35p

∑f = 44 + p

mean = 25 = 940 + 35p / 44 + p

1100 + 25p = 940 + 35p

10p =160

∴p = 16