Question

Notele obţinute la teza la matematica de catre elevii unei clase sunt redate in tabelul urmator:
NOTA: 3,4,5,6,7,8,9,10
Nr. elevi: 1,2,4,6,8,4,3,2.
Media clasei la teza este egala cu... .

Answer 1

[(3x1)+(4x2)+(5x4)+(6x6)+(7x8)+((8x4)+(9x3)+(10x2)]:30= (3+8+20+36+56+32+27+20):30= 202:30= 6,7(3)