In the stationery shop,
13 of the books sold were Math books.
13 of the remaining books sold were English books. The ratio of the number of English books sold to the number of Chinese books was 12 : 7. The number of Science books sold was 136. How many books were sold altogether?
Math |
Remaining books |
Total |
1x18 |
2x18 |
3x18 |
|
English |
Chinese |
Science |
|
|
1x12 = 12 u |
2x12 = 24 u |
|
|
12 |
7 |
|
|
18 u |
12 u |
7 u |
17 u |
54 u |
The number of English books is repeated. Make the number of English books the same. LCM of 1 and 12 is 12.
Number of Science books = 17 u
17 u = 136
1 u = 136 ÷ 17 = 8
Total number of books sold
= 54 u
= 54 x 8
= 432
Answer(s): 432