nilai rataan hitung dari data 6,7,7,3,k,4,6,5,5,9,10,10,4,3,4 adalah 6.nilai k adalah

{(2 × 3) + (3 × 4) + (2 × 5) + (2 × 6) + (2 × 7) + 9 + (2 × 10) + k} / 15 = 6

=> {6 + 12 + 10 + 12 + 14 + 9 + 20 + k} / 15 = 6

=> {83 + k} / 15 = 6

=> 83 + k = 6 × 15

=> 83 + k = 90

=> k = 90 - 83

=> k = 7