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B : C = 2 : 3
A : B : C = 6 : 10 : 15
umlah perbandingan = 6 + 10 + 15 = 31
jumlah uang mereka = 186000
A = 6/31 x 186000 = 36000
B = 10/31 x 186000 = 60000
C = 15/31 x 186000 = 90000
B = 10/31*186000=60000
C = 15/31*186000=90000