Jawabanmu

2014-04-08T19:43:53+07:00
NILAI X
 \frac{(x+2)+(2x-1)+(x)+3x+5x}{5} = 7
(x+2)+(2x-1)+(x)+3x+5x = 35
x + 2x + x + 3x + 5x + 2 - 1 = 35
12x - 1 = 35
12x = 34
x =  \frac{34}{12}
x = 2,83

URUTAN DATA
- data awal
(x + 2) = 4,83
(2x - 1) = 4,66
x = 2,83
3x = 8,49
5x = 14,15

- data setelah diurutkan
2,83
4,66
4,83 = kuartil 2 (median)
8,49
14,15

KUARTIL 1
 \frac{2,83 + 4,66}{2} = 3,745

KUARTIL 3
 \frac{8,49 + 14,15}{2} = 11,32