In the stationery kiosk,
15 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 13 : 6. The number of Math books sold was 165. How many books were sold altogether?
Science |
Remaining books |
Total |
1x13 |
4x13 |
5x13 |
|
Chinese |
English |
Math |
|
|
1x13 = 13 u |
3x13 = 39 u |
|
|
13 |
6 |
|
|
13 u |
13 u |
6 u |
33 u |
65 u |
The number of Chinese books is repeated. Make the number of Chinese books the same. LCM of 1 and 13 is 13.
Number of Math books = 33 u
33 u = 165
1 u = 165 ÷ 33 = 5
Total number of books sold
= 65 u
= 65 x 5
= 325
Answer(s): 325