In clasa a 5 sunt 25 de elevi.Calculati media clasei la evaluarea de la limba romana , stiind ca netele inregistrate sunt nota 4 un elev nota 5 un elev nota 6 doi elevi nota 7 cinci elevi nota 8 sase elevi nota 9 patru elevi si nota 10 sase elevi

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Răspunsuri

2014-11-06T18:32:23+02:00
Se calculeaza media aritmetica ponderata
M=(1*4+1*5+2*6+5*7+6*8+4*9+6*10)/25=
(4+5+12+35+48+36+60)/25=8
5 4 5
2014-11-06T18:35:10+02:00
Ma = ( 4 x 1 + 5 x 1 + 6 x 2 + 7 x 5 + 8 x 6 + 9 x 4 + 10 x 6 ) : 25 =
= ( 4 + 5 + 12 + 35 + 48 + 36 + 60 ) : 25 =
= 200 : 25 =
= 8
7 4 7