In the book shop,
13 of the books sold were Chinese books.
15 of the remaining books sold were Math books. The ratio of the number of Math books sold to the number of English books was 4 : 3. The number of Science books sold was 104. How many books were sold altogether?
Chinese |
Remaining books |
Total |
1x10 |
2x10 |
3x10 |
|
Math |
English |
Science |
|
|
1x4 = 4 u |
4x4 = 16 u |
|
|
4 |
3 |
|
|
10 u |
4 u |
3 u |
13 u |
30 u |
The number of Math books is repeated. Make the number of Math books the same. LCM of 1 and 4 is 4.
Number of Science books = 13 u
13 u = 104
1 u = 104 ÷ 13 = 8
Total number of books sold
= 30 u
= 30 x 8
= 240
Answer(s): 240