Xavier, Jeremy and Andy sold some notebooks. Andy sold 40% of the total number of notebooks sold by Jeremy and Xavier. Xavier sold 30% of the total number of notebooks sold by Jeremy and Andy. Jeremy sold 90 more notebooks than Andy. Find the total number of notebooks sold by all the boys.
| Xavier |
Jeremy |
Andy |
Total |
| 5x13 |
2x13 |
7x13 |
| 3x7 |
10x7 |
13x7 |
| 21 u |
44 u |
26 u |
91 u |
40% =
40100 =
25 30% =
30100 =
310 The total number of notebooks is repeated. Make the total number of notebooks the same. LCM of 7 and 13 is 91.
Number of more notebooks that Jeremy sold than Andy
= 44 u - 26 u
= 18 u
18 u = 90
1 u = 90 ÷ 18 = 5
Total number of notebooks sold
= 91 u
= 91 x 5
= 455
Answer(s): 455
