Ryan, Billy and Vincent sold some notebooks. Vincent sold 10% of the total number of notebooks sold by Billy and Ryan. Ryan sold 20% of the total number of notebooks sold by Billy and Vincent. Billy sold 387 more notebooks than Vincent. Find the total number of notebooks sold by all the boys.
| Ryan |
Billy |
Vincent |
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 Billy sold than Vincent
= 49 u - 6 u
= 43 u
43 u = 387
1 u = 387 ÷ 43 = 9
Total number of notebooks sold
= 66 u
= 66 x 9
= 594
Answer(s): 594
