Question

Calculati media aritmetica a nr
a) x=(12,1-11,9):4+4,5 si y= [(2,3+1,5)*12,5]:(2,05-1,25)
B) x=[( 3,15+5,05)*36,9]:[(17,5-10,30*0,41) si y=21,7*(11,8-4,5)

Answer 1

a) x=(12,1-11,9):4+4,5=0,2:4+4,5=0,05+4,5=4,55
    y= [(2,3+1,5)*12,5]:(2,05-1,25)=(3,8*12,5):0,8=47,5:0,8=59,375
(x+y)/2=(4,55+59,375)/2=63,925/2=31,9625

b) x=[( 3,15+5,05)*36,9]:[(17,5-10,30)*0,41]=
=( 8,20*36,9):(7,2*0,41)=302,58:2,952=102,5
    y=21,7*(11,8-4,5)=21,7*7,3=158,41
(x+y)/2=(102,5+158,41)/2=260,91/2=130,455