yg no 14 please, pake cara yaa^^ secepatnya yaa.. mau dikumpulkan bsk nih >_<

a) 6+9+7+5+5+4+6+8+X+2X = 50+3X

Mean = 50+3X / 10
6,5 = 50+3X / 10
50+3X = 6,5 × 10
50+3X = 65
3X = 65-50
X = 15/3
X = 5

b) Median

4,5,5,5,6,6,7,8,9,10

jadi mediannya
=(6+6):2
=12 : 2
=6


semoga benar ya