In the stationery shop,
14 of the books sold were Science books.
14 of the remaining books sold were Chinese books. The ratio of the number of Chinese books sold to the number of English books was 3 : 5. The number of Math books sold was 20. How many books were sold altogether?
| Science |
Remaining books |
Total |
| 1x4 |
3x4 |
4x4 |
| |
Chinese |
English |
Math |
|
| |
1x3 =
3 u |
3x3 =
9 u |
|
| |
3 |
5 |
|
|
| 4 u |
3 u |
5 u |
4 u |
16 u |
The number of Chinese books is repeated. Make the number of Chinese books the same. LCM of 1 and 3 is 3.
Number of Math books = 4 u
4 u = 20
1 u = 20 ÷ 4 = 5
Total number of books sold
= 16 u
= 16 x 5
= 80
Answer(s): 80
