# Find arithmetic mean of school wise savings in each mandal. Also find the arithmetic mean of saving of all schools.

75 views

closed

A FLATOUN social and financial educational programme initiated savings programme among the high school children in Hyderabad district. Mandal wise savings in a month are given in the following table

 Mandal No. of schools Total amount saved (in rupees Amberpet 6 2154 Thirumalgiri 6 2478 Saidabad 5 975 Khairathabad 4 912 Secunderabad 3 600 Bahadurpura 9 7533

Find arithmetic mean of school wise savings in each mandal. Also find the arithmetic mean of saving of all schools.

+1 vote
by (44.6k points)
edited by

 Mandal No. of schools fi Amount saved fixi School average in rupees = $\frac {f_ix_i}{f_i}$ Amberpet 6 2154 $\frac {2154}{6}$ 359 Thirumalgiri 6 2478 $\frac {2478}{6}$ = 413 Saidabad 5 975 $\frac {975}{5}$ = 195 Khairathabad 4 912 $\frac {912}{4}$ = 228 Secunderabad 3 600 $\frac {600}{3}$ = 200 Bahadurpura 9 7533 $\frac {7533}{9}$ = 837

Σfi = 33

Σfi xi = 14652

Mean = $\frac {\sum f_ix_i}{\sum f_i}$

$\overline x = \frac {14652}{33}$ = ₹ 444 (Mean savings per school)