Răspuns :
Mt = (4*28+5*24+3*30+6*35+2*20+6*32+5*25)/(4+5+3+6+2+6+5)
= (112+120+90+210+40+192+125)/31
= 889/31
≈ 28,68°
[tex]\it m_{a.p.}=\dfrac{4\cdot28+5\cdot24+3\cdot30+6\cdot35+2\cdot20+6\cdot32+5\cdot25}{4+5+3+6+2+6+5}=\\ \\ \\ =\dfrac{889}{31}\approx\ 28,6^o\ C[/tex]