In the bookstore,
15 of the books sold were Chinese books.
14 of the remaining books sold were Science books. The ratio of the number of Science books sold to the number of Math books was 13 : 10. The number of English books sold was 290. How many books were sold altogether?
Chinese |
Remaining books |
Total |
1x13 |
4x13 |
5x13 |
|
Science |
Math |
English |
|
|
1x13 = 13 u |
3x13 = 39 u |
|
|
13 |
10 |
|
|
13 u |
13 u |
10 u |
29 u |
65 u |
The number of Science books is repeated. Make the number of Science books the same. LCM of 1 and 13 is 13.
Number of English books = 29 u
29 u = 290
1 u = 290 ÷ 29 = 10
Total number of books sold
= 65 u
= 65 x 10
= 650
Answer(s): 650