
By: pearldyn (offline) Tuesday, March 02 2010 @ 09:38 AM CST (Read 2405 times)



pearldyn 
Hi, can anyone help me with this?
Mrs Mohamed bought some fruits. 2/7 of the fruits were apples.
The number of oranges was 1/4 the number of pears.
What fraction of the fruits were pears?
Answer given: 4/7
Thank you in advance!

Junior
Registered: 06/17/09 Posts: 30





By: uma2ravi (offline) Tuesday, March 02 2010 @ 08:53 PM CST



uma2ravi 
consider the total number of fruits as 1 and
therefore
2/7 of 1 (total no. of fruits) + 1/4 of Pears + Pears = 1
2/7+ 5/4 pears = 1
5/4 pears = 1 2/7 = 5/7
pears = 5/7 x 4/5 = 4/7
oranges = 1/4 of pears = 1/4 x 4/7 = 1/7

Newbie
Registered: 11/03/09 Posts: 1





By: pearldyn (offline) Wednesday, March 03 2010 @ 08:39 AM CST



pearldyn 
Hi, thanks for the reply. But I still dont understand where you get the 4/5?
consider the total number of fruits as 1 and
therefore
2/7 of 1 (total no. of fruits) + 1/4 of Pears + Pears = 1
2/7+ 5/4 pears = 1
5/4 pears = 1 2/7 = 5/7
pears = 5/7 x 4/5 = 4/7
oranges = 1/4 of pears = 1/4 x 4/7 = 1/7

Junior
Registered: 06/17/09 Posts: 30





By: nisalam (offline) Monday, May 17 2010 @ 08:26 AM CDT



nisalam 
since there the number of oranges is 1/4 the number of pears, the total number of units of oranges and pears would be 5, of which pears make 4 units and oranges make 1 unit. That is why you divide the 5/7 by 5 then multiply by 4 (ie multiply by 4/5). hope this helps!

Junior
Registered: 04/29/10 Posts: 30





By: rathanackumr (offline) Monday, September 06 2010 @ 03:28 AM CDT



rathanackumr 
It is actually a 2part question. 2nd part deals with ratio rather than fraction. it is handled more extensively in P5 than P4.
Hope my attached answer helps. Cheers

Junior
Registered: 07/22/10 Posts: 18





By: tanhuimin (offline) Monday, September 06 2010 @ 07:20 AM CDT



tanhuimin 
Hi all,
This is a P4 question, so try to solve it by using what a P4 student has learnt. Don't need to be too complicated, u will end up confuse the student.
It is actually not a very difficult question.
Pls refer to the model.

Junior
Registered: 12/31/06 Posts: 18



