Question

Diketahui data n - 2, 2n - 3, n + 2, n - 1 dan n + 3 mempunyai rata-rata 7. variasi data tersebut............

Answer 1

Maka :
ada 5 data
rata-rata = 7
Jawab :
{(n - 2) + (2n-3) + (n + 2) + (n - 1) + (n + 3)} : 5 = 7
{(n - 2) + (2n-3) + (n + 2) + (n - 1) + (n + 3)} = 35
6n - 1 = 35
6n = 35 + 1
6n = 36
  n = 36 : 6
  n = 6

Variasi data :
(n - 2) , (2n-3) , (n + 2) ,  (n - 1) , (n + 3)
(6 - 2) , (4 - 3) , (6 + 2)  (6 - 1) , (6 + 3)
4 , 1 , 8 , 5 , 9