Ivory has 3 times as many pens as Cathy. Cathy has
47 as many pens as Gwen. If the three of them have a total of 230 pens, how many pens does Ivory have?
| Ivory |
Cathy |
Gwen |
| 3x4 |
1x4 |
|
| |
4x1 |
7x1 |
| 12 u |
4 u |
7 u |
The number of pens that Cathy has is repeated. Make the number of pens that Cathy has the same. LCM of 1 and 4 is 4.
Total number of pens that the three of them have
= 12 u + 4 u + 7 u
= 23 u
23 u = 230
1 u = 230 ÷ 23 = 10
Number of pens that Ivory has
= 12 u
= 12 x 10
= 120
Answer(s): 120
