In the shop,
15 of the books sold were English books.
14 of the remaining books sold were Chinese books. The ratio of the number of Chinese books sold to the number of Science books was 14 : 3. The number of Math books sold was 390. How many books were sold altogether?
English |
Remaining books |
Total |
1x14 |
4x14 |
5x14 |
|
Chinese |
Science |
Math |
|
|
1x14 = 14 u |
3x14 = 42 u |
|
|
14 |
3 |
|
|
14 u |
14 u |
3 u |
39 u |
70 u |
The number of Chinese books is repeated. Make the number of Chinese books the same. LCM of 1 and 14 is 14.
Number of Math books = 39 u
39 u = 390
1 u = 390 ÷ 39 = 10
Total number of books sold
= 70 u
= 70 x 10
= 700
Answer(s): 700