In the stationery kiosk,
13 of the books sold were English books.
15 of the remaining books sold were Chinese books. The ratio of the number of Chinese books sold to the number of Math books was 10 : 3. The number of Science books sold was 222. How many books were sold altogether?
| English |
Remaining books |
Total |
| 1x25 |
2x25 |
3x25 |
| |
Chinese |
Math |
Science |
|
| |
1x10 =
10 u |
4x10 =
40 u |
|
| |
10 |
3 |
|
|
| 25 u |
10 u |
3 u |
37 u |
75 u |
The number of Chinese books is repeated. Make the number of Chinese books the same. LCM of 1 and 10 is 10.
Number of Science books = 37 u
37 u = 222
1 u = 222 ÷ 37 = 6
Total number of books sold
= 75 u
= 75 x 6
= 450
Answer(s): 450
