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Erika : Wati = 4 : 5
=> Asri : Erika : Wati
8 : 12 : 15
Uang asri + wati (8+15) = 460.000
U. Wati = 15/(8+15) x 460.000 = 15/23 x 460.000 = 300.000
U. Erika = 12/23 x 460.000 = 240.000
Jumlah U wati + erika = 300.000+240.000 = 540.000