In the stationery kiosk,
15 of the books sold were Chinese books.
14 of the remaining books sold were English books. The ratio of the number of English books sold to the number of Science books was 3 : 2. The number of Math books sold was 42. How many books were sold altogether?
| Chinese |
Remaining books |
Total |
| 1x3 |
4x3 |
5x3 |
| |
English |
Science |
Math |
|
| |
1x3 =
3 u |
3x3 =
9 u |
|
| |
3 |
2 |
|
|
| 3 u |
3 u |
2 u |
7 u |
15 u |
The number of English books is repeated. Make the number of English books the same. LCM of 1 and 3 is 3.
Number of Math books = 7 u
7 u = 42
1 u = 42 ÷ 7 = 6
Total number of books sold
= 15 u
= 15 x 6
= 90
Answer(s): 90
