Question

for a certain grouped frequency distribution a=5 €fixi-5=200 €fi=25 find the mean x

Answer 1

Given
a = 5
€fixi -5 = 200 (200 is the value in which a is removed so for finding mean we have to add a)
€fi = 25

so mean = €fixi + a / €fi ( by asumed mean method)
= 200+5/25
=205/25
$8.2$