Question

Find mean with direct and short cut method ,x=10,20,30,40,50 f=4,5,3,2,5

Answer 1

x=10, 20,30,40,50

f=4, 5,3,2,5

fixi=40+100+90+80+250

=560

fi=19

x =sigmaxifi/fi

=560/19

=29.4

I hope it is the answer