Media aritmetică [tex] \frac{a + b}{2} [/tex]
a) [tex] \frac{12 + 18}{2} = \frac{30}{2} = 15[/tex]
b) [tex] \frac{204 + 305}{2} = \frac{509}{2} = 254.5[/tex]
c) [tex] \frac{7 + 8.4}{2} = \frac{15.4}{2} = 7.7[/tex]
d) [tex] \frac{9 + 14.32}{2} = \frac{23.32}{2} = 11.66[/tex]
e) [tex] \frac{10.5 + 47.34}{2} = \frac{57.84}{2} = 28.92[/tex]
f) [tex] \frac{10 + 12 + 30.2}{3} = \frac{52.2}{3} = 17.4[/tex]
