PSLE A shop had a number of stereo systems for sale. After selling 99 of them in the morning and
14 of the remainder in the afternoon, it was left with
15 of the stereo systems. How many stereo systems were sold altogether?
Morning |
Remainder |
|
Afternoon |
Left |
99 |
1x1 |
3x1 |
4x3 |
1x3 |
11 u |
1 u |
3 u |
Fraction of the remainder left
= 1 -
14 =
34 3x14x1 Remainder =
1x35x3 Total
34 Remainder =
315 Total
Number of stereo systems sold in the morning
= 12 u - 1 u
= 11 u
11 u = 99
1 u = 99 ÷ 11 = 9
Number of stereo systems sold in the afternoon
= 1 u
= 1 x 9
= 9
Answer(s): 9