Răspuns :
a) 2 + 3 + 5 + 6 + 2 + 3 + 2 = 23
b) 5 elevi
c) (4*2 + 5*3 + 6*5 + 7*6 + 8*2 + 9*3 + 10*2)/23 = (8 + 15 + 30 + 42 + 16 + 27 + 20)/23 = 6,86
b) 5 elevi
c) (4*2 + 5*3 + 6*5 + 7*6 + 8*2 + 9*3 + 10*2)/23 = (8 + 15 + 30 + 42 + 16 + 27 + 20)/23 = 6,86