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7 =
7 =
7 =
7(28 + x) = 184 + 8x
196 + 7x = 184 + 8x
7x - 8x = 184 - 196
- x = - 12
x = 12
2) rata" =
=
=
= 162,7
3) .n = x 90 = 45
Me = 100,5 + x 10
= 100,5 + 10
= 110,5
me gaji = 110,5 x 10.000
= 1.105.000
6 x 8 = 48
7 x 10 = 70
8 x X = 8 X
9 x 4 = 36
6+8+10+x+4 = 28 + x
30 + 48 + 70 +8x + 36 = 184 + 8x
7 = 184x + 8x / 28 +x
7 ( 28 + x ) = 184 + 8x
196 +7x = 184 + 8x
7x - 8x = 184 - 196
-1x = - 12
x = 12
2. 162,7
3. letak median
= 1/2 . n = 1/2 . 90 = 45
jadi letaknya di 25
me = TB + P ( 1/2.n - fk / fi )
= 100,5 + 10 ( 45 - 20 / 25 )
= 100,5 + 10 ( 25/25 )
= 110,5
= 110,5 x 10.000
= 1.105.000