In the shop,
15 of the books sold were Math books.
14 of the remaining books sold were Science books. The ratio of the number of Science books sold to the number of English books was 13 : 8. The number of Chinese books sold was 279. How many books were sold altogether?
Math |
Remaining books |
Total |
1x13 |
4x13 |
5x13 |
|
Science |
English |
Chinese |
|
|
1x13 = 13 u |
3x13 = 39 u |
|
|
13 |
8 |
|
|
13 u |
13 u |
8 u |
31 u |
65 u |
The number of Science books is repeated. Make the number of Science books the same. LCM of 1 and 13 is 13.
Number of Chinese books = 31 u
31 u = 279
1 u = 279 ÷ 31 = 9
Total number of books sold
= 65 u
= 65 x 9
= 585
Answer(s): 585