Saturday, October 23, 2021
01:02 AM (GMT +5)

Go Back   CSS Forums > CSS Compulsory Subjects > General Science & Ability > General Ability

General Ability Quantitative Ability/Reasoning ; Logical Reasoning ; Analytical Reasoning/Ability ; Mental Abilities

Reply Share Thread: Submit Thread to Facebook Facebook     Submit Thread to Twitter Twitter     Submit Thread to Google+ Google+    
 
LinkBack Thread Tools Search this Thread
  #1  
Old Wednesday, June 07, 2017
Junior Member
 
Join Date: Nov 2016
Location: Fsd
Posts: 8
Thanks: 0
Thanked 0 Times in 0 Posts
sahilkhokhar is on a distinguished road
Default Hy guys plz answer this question with explanation

Five years ago , the average age of p and q was 15 years, average age of p, q and r today is 20 years, how old will r be after 10 years.
Reply With Quote
  #2  
Old Wednesday, June 07, 2017
Anum Zara's Avatar
Senior Member
 
Join Date: Oct 2013
Location: UTOPIA
Posts: 582
Thanks: 99
Thanked 329 Times in 217 Posts
Anum Zara is on a distinguished road
Default

Quote:
Originally Posted by sahilkhokhar View Post
Five years ago , the average age of p and q was 15 years, average age of p, q and r today is 20 years, how old will r be after 10 years.
5 years ago, average age of p & q was:
(We are subtracting 5 as it was 5 years ago & dividing by 2 as it was their average age.)
{(p-5)+(q-5)}/ 2 = 15
(p+q-10)/2 = 15
Multiply by 2 on both sides
p+q-10 = 30
p+q= 30+10
p+q= 40 -------- Equation (I)

Average age of p,q & r today:
(Dividing by 3 as it is average age of 3)
(p+q+r)/3 = 20
Multiply by 3 on both sides
p+q+r = 60 ------ Equation (II)

Now subtract equation I from equation 2
p+q+r = 60
- p+q = 40
-------------
r = 20
-------------

present age of r= 20 years
age of r after 10 years= 20+10
age of r after 10 years= 30 years
__________________
WA-TU-IZZU MANTASHA; WATU-ZILLU MANTASHA
Reply With Quote
The Following 2 Users Say Thank You to Anum Zara For This Useful Post:
Mehwishsahar (Monday, November 06, 2017), syeda shumaila (Monday, January 08, 2018)
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Most Important English Idioms For PSC,CSS,PMS Exam sono punam Grammar-Section 3 Wednesday, May 13, 2020 06:06 PM
Career Opportunities (Employees' Old-Age Benefits Institution (EOBI)) moazim ali Jobs Announcements 3757 Saturday, January 13, 2018 10:42 AM
G.K objectives for all terminator Topics and Notes 17 Friday, July 15, 2016 10:07 PM
FPSC Padagoy all MCQs for lecturer test sono punam Other Examinations 15 Wednesday, June 22, 2016 05:43 AM
FPSC Consolidated Advertisement No. 01/ 2014 Sabir Basheer Jobs Announcements 150 Sunday, July 20, 2014 01:32 PM


CSS Forum on Facebook Follow CSS Forum on Twitter

Disclaimer: All messages made available as part of this discussion group (including any bulletin boards and chat rooms) and any opinions, advice, statements or other information contained in any messages posted or transmitted by any third party are the responsibility of the author of that message and not of CSSForum.com.pk (unless CSSForum.com.pk is specifically identified as the author of the message). The fact that a particular message is posted on or transmitted using this web site does not mean that CSSForum has endorsed that message in any way or verified the accuracy, completeness or usefulness of any message. We encourage visitors to the forum to report any objectionable message in site feedback. This forum is not monitored 24/7.

Sponsors: ArgusVision   vBulletin, Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.