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Sunday, February 26 2017 @ 04:02 AM CST
 Forum Index >  Test Paper Related >  Primary 5 Matters
 P5 Ratio
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By: tangara (offline)  Monday, January 02 2012 @ 10:32 AM CST (Read 1329 times)  
tangara

Dear forum members,

Happy new year. I would like to know the solution of the question below:-

Last month, the ratio of male workers to female workers in a factory was 15:7.
There were 56 female workers in the factory. Some of the male workers were
retrenched this month. As a result, the ratio of the remaining male workers to
female workers became 3:4. How many male workers were there in the factory
this month?

Thanks.

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Registered: 07/31/10
Posts: 26

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By: RachelAng (offline)  Monday, January 02 2012 @ 10:48 PM CST  
RachelAng

I think it is like this.
F:M
7:15
56: ?
Take 56 divide by 7 = 8.
So 15 x 8 = 120.

So F:M
56:120
New ratio after retrenchment of male worker is
F:M
4:3
No change in the no. of female. So take 56 divide by 4 = 14.
then take 3 x 14 = 42.
F:M
56:42
No. of male workers left = 42.

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By: samwh (offline)  Wednesday, January 04 2012 @ 07:29 PM CST  
samwh

Hi,

See if the attachment helps .

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Registered: 12/26/10
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By: nisalam (offline)  Friday, January 13 2012 @ 12:45 AM CST  
nisalam

Seems like the first ratio is completely irrelevant, given as a red herring to waste the children's time. The second ratio indicates that currently males are 3/4 the number of females. We know there are 56 females. So 3/4 of 56 makes 42.

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Registered: 04/29/10
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