tolong dibantu pls,dikumpulkan besok

x = (1 × 5) + (4 × 6) + (5 × 7) + (6 × 8) + (3 × 9) + (4 × 10) / (1+4+5+6+3+4)
= (5 + 24 + 35 + 48 + 27 + 40) / 23
= 179 / 23
= 7,7
dbwh rata2 = 5 + 4 + 1 = 10