Sign Up!
Login
Welcome to Test-paper.info
Tuesday, December 12 2017 @ 07:48 PM CST
 Forum Index >  Test Paper Related >  Primary 6 Matters
 Henry Park Preliminary 2011 Paper 2 Q17
   |  Printable Version
By: parent603 (offline)  Sunday, July 01 2012 @ 11:57 PM CDT (Read 1074 times)  
parent603

Please help to answer Henry Park Preliminary 2011 Paper 2 Q17.

My answer is 492 but answer key is 450.

Thank you for your confirmation on the correct answer. Smile

Forum Newbie
Newbie


Registered: 11/07/11
Posts: 14

Profile Email    
   
By: jo sarah (offline)  Monday, July 02 2012 @ 08:28 AM CDT  
jo sarah

at first:
Parade grd has 0.4 * 600 = 240 girls
indoor hall has 0.6 * 400 = 240 girls. So, total = 480 girls and 520 boys
in the end:
let no. in parade grd be p and that in indoor hall be i
then, no. of girls: 0.3p + 0.7i = 480 [1]
no. of boys: 0.7p + 0.3i = 520 [2]
so, [1] * 7: 2.1p + 4.9i = 3360 [3]
[2] * 3: 2.1p + 0.9i = 1560 [4]
[3] - [4]: 4i = 1800
thus, i = 450

So that, there are 450 pupils in the indoor hall in the end.

thank you. Smile

Forum Regular Member
Regular Member

Registered: 03/20/12
Posts: 111

Profile Email    
   


 All times are CST. The time is now 07:48 pm.
Normal Topic Normal Topic
Locked Topic Locked Topic
Sticky Topic Sticky Topic
New Post New Post
Sticky Topic w/ New Post Sticky Topic w/ New Post
Locked Topic w/ New Post Locked Topic w/ New Post
View Anonymous Posts 
Able to Post 
HTML Allowed 
Censored Content