Helpme !!! plissssss

semoga membantu yaa!

rata" = (4×4)+(5×5)+(6×8)+(7×5)+(8×4)+(9×3)+(10×1) / 4+5+8+5+4+3+1 = 16+25+48+35+32+27+10 / 30= 150/30 = 5
jadi rata ratanya 5

*maaf jika salah