Dylan, Mark and Zeph sold some notebooks. Zeph sold 10% of the total number of notebooks sold by Mark and Dylan. Dylan sold 20% of the total number of notebooks sold by Mark and Zeph. Mark sold 215 more notebooks than Zeph. Find the total number of notebooks sold by all the boys.
| Dylan |
Mark |
Zeph |
Total |
| 10x6 |
1x6 |
11x6 |
| 1x11 |
5x11 |
6x11 |
| 11 u |
49 u |
6 u |
66 u |
10% =
10100 =
110 20% =
20100 =
15 The total number of notebooks is repeated. Make the total number of notebooks the same. LCM of 11 and 6 is 66.
Number of more notebooks that Mark sold than Zeph
= 49 u - 6 u
= 43 u
43 u = 215
1 u = 215 ÷ 43 = 5
Total number of notebooks sold
= 66 u
= 66 x 5
= 330
Answer(s): 330
