PSLE A shop had a number of hi-fi systems for sale. After selling 38 of them in the morning and
16 of the remainder in the afternoon, it was left with
15 of the hi-fi systems. How many hi-fi systems were sold altogether?
Morning |
Remainder |
|
Afternoon |
Left |
38 |
1x1 |
5x1 |
4x5 |
1x5 |
19 u |
1 u |
5 u |
Fraction of the remainder left
= 1 -
16 =
56 5x16x1 Remainder =
1x55x5 Total
56 Remainder =
525 Total
Number of hi-fi systems sold in the morning
= 20 u - 1 u
= 19 u
19 u = 38
1 u = 38 ÷ 19 = 2
Number of hi-fi systems sold in the afternoon
= 1 u
= 1 x 2
= 2
Answer(s): 2