Question

va rog
dau coroana  la primul raspuns​

Answer 1

Explicație pas cu pas:

[(3×2)+(4×3)+(5×3)+(6×4)+(7×3)+(8×5)+(9×3)+(10×2)]÷8=

(6+12+15+24+21+40+27+20)÷8

=165÷8=20,625

Answer 2

Media =

$\frac{2 × 3 + 4 × 3 + 5 × 3 + 6 × 4 + 7 × 3 + 8 × 5 + 9 × 3 + 10 × 2}{2 + 3 + 3 + 4 + 5 + 3 + 2} = \frac{6 + 12 + 15 + 24 + 21 + 40 + 27 + 20}{22} = \frac{165}{22} = 7.5$