Tiffany had 108 markers.
23 of them were red markers and the rest were black markers. After she had given away some red markers, the ratio of the number of red markers to the number of black markers became 5 : 6. How many markers did she have in the end?
| |
Red |
Black |
Total |
| Before |
2x6 =
12 u |
1x6 =
6 u |
3x6 =
18 u |
| Change |
- 7 u |
|
|
| After |
5 u |
6 u |
11 u |
The number of black markers remained unchanged.
LCM of 1 and 6 = 6
Total number of markers at first = 18 u
18 u = 108
1 u = 108 ÷ 18 = 6
Number of markers that Tiffany had in the end
= 5 u + 6 u
= 11 u
= 11 x 6
= 66
Answer(s):66
