In the shop,
13 of the books sold were Math books.
12 of the remaining books sold were Science books. The ratio of the number of Science books sold to the number of Chinese books was 11 : 9. The number of English books sold was 4. How many books were sold altogether?
Math |
Remaining books |
Total |
1x11 |
2x11 |
3x11 |
|
Science |
Chinese |
English |
|
|
1x11 = 11 u |
1x11 = 11 u |
|
|
11 |
9 |
|
|
11 u |
11 u |
9 u |
2 u |
33 u |
The number of Science books is repeated. Make the number of Science books the same. LCM of 1 and 11 is 11.
Number of English books = 2 u
2 u = 4
1 u = 4 ÷ 2 = 2
Total number of books sold
= 33 u
= 33 x 2
= 66
Answer(s): 66