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 Forum Index >  Test Paper Related >  Primary 6 Matters
 P6 Maths who can help
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By: QiuJiao (offline)  Thursday, July 29 2010 @ 11:36 PM CDT (Read 1698 times)  
QiuJiao

There were 156 more pupils in the playground than in the library, 1/5 of the pupils in the library were girls and 5/6 of pupils in the playground were boys, if the were 17 more girls in the playground than in the library, find the total number of pupils in the two place?

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By: lemofish (offline)  Friday, July 30 2010 @ 03:09 AM CDT  
lemofish

No. of boys in Playground=> 5p
No. of Girls in Playground: 1p
Total no. of boys & girls in playground=>6p

No. of boys in Library=> 4u
No. of girls in library => 1u
Total no. of boys & girls in library=>5u

Since there were 156 more pupils in playground than in Library,
6p-5u=156..(1)

and since there were 17 more girls in playground than it Library,
1p-1u=17..(2)
(2)x6,
6p-6u=102...(3)

(1) - (3),
u=54
p=17+54=71

Therefore, the no. of pupils in the 2 places is 6p+5u=426+270=696

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By: QiuJiao (offline)  Thursday, August 05 2010 @ 02:00 AM CDT  
QiuJiao

Thank you

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By: rathanackumr (offline)  Monday, September 06 2010 @ 03:39 PM CDT  
rathanackumr

Different approach using models

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