In the stationery kiosk,
13 of the books sold were English books.
12 of the remaining books sold were Science books. The ratio of the number of Science books sold to the number of Math books was 10 : 9. The number of Chinese books sold was 10. How many books were sold altogether?
| English |
Remaining books |
Total |
| 1x10 |
2x10 |
3x10 |
| |
Science |
Math |
Chinese |
|
| |
1x10 =
10 u |
1x10 =
10 u |
|
| |
10 |
9 |
|
|
| 10 u |
10 u |
9 u |
1 u |
30 u |
The number of Science books is repeated. Make the number of Science books the same. LCM of 1 and 10 is 10.
Number of Chinese books = 1 u
1 u = 10
1 u = 10 ÷ 1 = 10
Total number of books sold
= 30 u
= 30 x 10
= 300
Answer(s): 300
