
hi, can help us with this qn? tq!
Source: Nanyang Primary
hi, can help us with this qn? tq!
Source: Nanyang Primary
salary ——- 40 units
(1/4) x 40 units = 10 units (bag)
40 units – 10 units = 30 units
(1/6) x 30 units = 5 units (shoes)
225 (scarf)
2/5 of the rest of her money (mother)
180 (son)
(3/10) x 40 units = 12 units (left)
3/5 of the rest of her money ——- 180 + 12 units
1/5 of the rest of her money ——- 60 + 4 units
5/5 of the rest of her money ——- 300 + 20 units
300 + 20 units + 225 ——- 40 units – 10 units – 5 units = 25 units
1 unit ——- (300 + 225)/5 = 105
40 units ——- 105 x 40 = 4200
Ans : $4200.
2016 Nanyang P6 SA1 Q18
AF, 40u (branch)
remaining 1/4 -> 10u
left -> 30u
spent 1/6 + 225
remaining- > 25u – 225
spent 2/5
remaining-> 15u -135
ITE, 3/10 of her salary left ->3/10 x 40u = 12u
15u – 135 = 12u +180
15u – 12u = 180 +135
3u = 315
1u =105
40u = 4200 (ans)
tq!