nomor 19 nya bingungin nih.. (need help)

misal uang ibu awal = 1

sisa uang ibu
= 1 - ½ - 1/12 - 1/3
= 12/12 - 6/12 - 1/12 - 4/12
= 1/12
= 24.000

uang ibu awalnya
= 24.000 ÷ 1/12
= 24.000 × 12/1
= 288.000 ( D)

6/12+4/12+1/12 = 11/12 × 24.000
11×24.000= 264.000
264.000:12=22.000
jumlah sisa uang ditambah 22.000=
A.Rp 46.000