Jawab:
Misal 4 bilangan: a, b, c, d
a = 30
d=60
c-b = 10 -> c = b + 10
mean = 45
(a + b + c + d)/4 = 45
a + b + c + d = 180
(masukkan nilai a dan d yang diketahui, serta persamaan c)
30 + b + (b + 10) + 60 = 180
2b + 100 = 180
2b = 80
b = 40
-> c = b + 10 = 50
maka empat bilangan tersebut adalah :
30, 40, 50, 60
median = (40 + 50) / 2
median = 90/2 = 45
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Jawab:
Misal 4 bilangan: a, b, c, d
a = 30
d=60
c-b = 10 -> c = b + 10
mean = 45
(a + b + c + d)/4 = 45
a + b + c + d = 180
(masukkan nilai a dan d yang diketahui, serta persamaan c)
30 + b + (b + 10) + 60 = 180
2b + 100 = 180
2b = 80
b = 40
-> c = b + 10 = 50
maka empat bilangan tersebut adalah :
30, 40, 50, 60
median = (40 + 50) / 2
median = 90/2 = 45