PSLE A shop had a number of stereo systems for sale. After selling 100 of them in the morning and
211 of the remainder in the afternoon, it was left with
14 of the stereo systems. How many stereo systems were sold altogether?
Morning |
Remainder |
|
Afternoon |
Left |
100 |
2x1 |
9x1 |
3x9 |
1x9 |
25 u |
2 u |
9 u |
Fraction of the remainder left
= 1 -
211 =
911 9x111x1 Remainder =
1x94x9 Total
911 Remainder =
936 Total
Number of stereo systems sold in the morning
= 27 u - 2 u
= 25 u
25 u = 100
1 u = 100 ÷ 25 = 4
Total number of stereo systems sold
= 27 u
= 27 x 4
= 108
Answer(s): 108