Question

find the mean if£fixi=525,n=25​

Answer 1

Answer:

1. mean =fi apone xi=
2. 525_25=21

Answer 2

SOLUTION

TO DETERMINE

The mean when

$\sf{ \sum \:f_ix_i = 525 \: \: and \: \: N = 25 }$

EVALUATION

Here it is given that

$\sf{ \sum \:f_ix_i = 525 \: \: and \: \: N = 25 }$

Hence the required mean

$\displaystyle\sf{ = \frac{ \sum \:f_ix_i }{ \sum \:f_i} }$

$\displaystyle\sf{ = \frac{ \sum \:f_ix_i }{ N } }$

$\displaystyle\sf{ = \frac{ 525 }{25 } }$

$= 21$

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