Go to navigation
It is currently Tue Dec 06, 2016 2:10 pm

All times are UTC




Post new topic Reply to topic  [ 3 posts ] 
Author Message
PostPosted: Fri Mar 08, 2013 12:37 pm 
Offline

Joined: Sun Dec 09, 2012 1:25 pm
Posts: 24
Please help with this question

The mean (average) of four whole numbers is 16. The mean of three of them is 14.
The remaining number must be
A 2
B 15
C 22
D 30

This is fron sample paper of LANCASTER ROYAL GRAMMAR SCHOOL.

Thanks


Top
 Profile  
 
PostPosted: Fri Mar 08, 2013 12:41 pm 
Offline

Joined: Fri Sep 15, 2006 8:51 am
Posts: 8113
henna025 wrote:
Please help with this question

The mean (average) of four whole numbers is 16. The mean of three of them is 14.
The remaining number must be
A 2
B 15
C 22
D 30

This is fron sample paper of LANCASTER ROYAL GRAMMAR SCHOOL.

Thanks


If the mean of 4 numbers is 16 then the total = 64
if the mean of 3 numbers is 14 then the total is 42

so remaining number is 22 i e how much do you have to add to get a mean of 16.


Top
 Profile  
 
PostPosted: Fri Mar 08, 2013 2:57 pm 
Offline

Joined: Sun Dec 09, 2012 1:25 pm
Posts: 24
Thanks a lot :)


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 3 posts ] 

All times are UTC


Who is online

Users browsing this forum: No registered users and 3 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
CALL 020 8204 5060
   
Privacy Policy | Refund Policy | Disclaimer | Copyright © 2004 – 2016