Jen had thrice as many pens as markers. After giving away 25 pens and selling 24 pens, she found out that she had twice as many pens as markers left.
- How many pens did Jen have at first?
- How many pens and markers did Jen have altogether at first?
|
Pens |
Markers |
Total |
Before |
3 u |
1 u |
4 u |
Change 1 |
- 25 |
|
- 1 u |
Change 2 |
- 24 |
|
After |
2 u |
1 u |
3 u |
(a)
The number of markers remains unchanged.
Number of pens that Jen gave away or sold
= 3 u - 2 u
= 1 u
1 u = 25 + 24 = 49
Number of pens that Jen had at first
= 3 u
= 3 x 49
= 147
(b)
Total number of pens and markers that Jen had at first
= 1 u + 3 u
= 4 u
= 4 x 49
= 196
Answer(s): (a) 147; (b) 196