Nilai matematika 30 siswa sebagai berikut 70,80,60,80,50,70,80,60,90,70,80,70,70,80,60,70,80,90,60,80,70,80,60,60,80,90,70,80,70,90.

50=1
60=6
70=9
80=10
90=4
modus=80
median=70
rata rata/mean=(50 dikali 1)+(60 dikali 6)+(70 dikali 9)+(80 dikali 10)+(90 dikali 4)=50+360+630+800+360=2.200:(1+6+9+10+4)=2.200:30=73,333=73,3

semoga bermanfaat:)

70+80=150+60=210+80=290+70=360+50=410+80=490+60=550+90=640+70=710+80=790+70=860+70=950+80=1030+60=1090+70=1160+80=1240+90=1330+60=1390+80=1470+70=1540+80=1620+60=1680+60=1740+80=1820+90=1910+70=1980+80=2060+70=2130+90=2220

Rata2 = 2220/30=74