Question

see the attached file and answer it for me ​

Answer 1

MATE

YOUR SOLUTION IS IN ATTACHED PICTURE ☺️

Answer 2

now in mean deviation from mean formula is

sigma. fi|xi-mean|/n

n=sigma fi

now mean is

sigma fixi/sigma fi

18+40+105+225+88+52/6+8+15+25+8+4

=528/66=8

now fi sigma|xi-mean| =

30+24+15+25+24+20=138

now sigma fi=66

138/66=2.090909