nomor 37 yg bisa jawab minta foto.nya

Mean = 45 + 40 + x + 30 + 20 / 5
         41  = 135 + x / 5 
 41.5 = 135 + x
 205 = 135 + x
 x = 205 - 135 = 70 :))

(45+40+x+30+20)/5=41
《 =》135+x = 41×5
135+x = 205
x = 205 - 135
= 70 (D)