PSLE A shop had a number of hard drives for sale. After selling 80 of them in the morning and
25 of the remainder in the afternoon, it was left with
15 of the hard drives. How many hard drives were left?
Morning |
Remainder |
|
Afternoon |
Left |
80 |
2x1 |
3x1 |
4x3 |
1x3 |
10 u |
2 u |
3 u |
Fraction of the remainder left
= 1 -
25 =
35 3x15x1 Remainder =
1x35x3 Total
35 Remainder =
315 Total
Number of hard drives sold in the morning
= 12 u - 2 u
= 10 u
10 u = 80
1 u = 80 ÷ 10 = 8
Number of hard drives left
= 3 u
= 3 x 8
= 24
Answer(s): 24