Nilai=5,6,7,8,9,10 frekuensi=3,6,8,n,7,5 tentukan nilai n?

7,7 = (5 × 3) + (6 × 6) + (7 × 8) + (8 × n) + (9 × 7) + (10 × 5) / 3 + 6 + 8 + n + 7 + 5
77/10 = 15 + 36 + 56 + 8n + 63 + 50 / 29 + n
77/10 = 220 + 8n / 29 + n
77(29 + n) = 10(220 + 8n)
2233 + 77n = 2200 + 80n
2233 - 2200 = 80n - 77n
33 = 3n
n = 33 / 3
n = 11