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Friday, August 18 2017 @ 03:53 AM CDT
 Forum Index >  Test Paper Related >  Primary 6 Matters
 Problem Sum - Ratio
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By: rpgwwk (offline)  Sunday, March 18 2012 @ 12:37 PM CDT (Read 859 times)  
rpgwwk

Please help:

In a library, 1/5 of the number of English books is the same as 2/3 of the number of Chinese books.
There are 49 fewer Chinese books than English books. Find
a) the ratio of the number of English books to the number of Chinese books
b) the total number of Chinese and English books

Thank you in advance! Smile

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By: jo sarah (offline)  Tuesday, March 20 2012 @ 10:03 AM CDT  
jo sarah

(a) 1/5 English books = 2/3 Chinese books, means
2/10 English books = 2/3 Chinese books
therefore, there are 10 units of English books and 3 units of Chinese books
So, ratio of English to Chinese books = 10 : 3

(b) 10 units - 3 units = 7 units is 49 books
1 unit is 49 / 7 = 7 books
So, total no, of Chinese and English books = 13 units
= 13 x 7 = 51 books

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