PSLE A shop had a number of hard drives for sale. After selling 72 of them in the morning and
710 of the remainder in the afternoon, it was left with
16 of the hard drives. How many hard drives were sold altogether?
Morning |
Remainder |
|
Afternoon |
Left |
72 |
7x1 |
3x1 |
5x3 |
1x3 |
8 u |
7 u |
3 u |
Fraction of the remainder left
= 1 -
710 =
310 3x110x1 Remainder =
1x36x3 Total
310 Remainder =
318 Total
Number of hard drives sold in the morning
= 15 u - 7 u
= 8 u
8 u = 72
1 u = 72 ÷ 8 = 9
Number of hard drives sold in the afternoon
= 7 u
= 7 x 9
= 63
Answer(s): 63