Tolong jawab soal berikut

1. Rata-rata = (5×1) + (6×5) + (7×4) + (8×3) + (9×2) ÷ (1+5+4+3+2)
= 5 + 30 + 28 + 24 + 18 ÷ 15
= 105 ÷ 15
= 7

2. 6,6,7,7,8,8,8,9,10
Median = 8

3. 165, 166, 166, 167, 172, 175, 178, 178, 179, 180, 181, 181, 182, 182, 185, 188
Median = (178+179)÷2
= 357÷2
= 178,5