Data Interpretation - Table Charts - Discussion

Study the following table and answer the questions.

Number of Candidates Appeared and Qualified in a Competitive Examination from Different States Over the Years.

State Year
1997 1998 1999 2000 2001
App.Qual. App.Qual. App.Qual. App.Qual. App.Qual.
M520072085009807400850680077595001125
N7500840920010508450920920098088001020
P64007808800102078008908750101097501250
Q8100950950012408700980970012008950995
R780087076009409800135076009457990885

1. 

Total number of candidates qualified from all the states together in 1997 is approximately what percentage of the total number of candidates qualified from all the states together in 1998?

[A]. 72%
[B]. 77%
[C]. 80%
[D]. 83%

Answer: Option C

Explanation:

Required percentage
= [ (720 + 840 + 780 + 950 + 870) x 100 ] %
(980 + 1050 + 1020 + 1240 + 940)
= [ 4160 x 100 ] %
5230
= 79.54% ~= 80%.


Pankaj said: (Jun 28, 2011)  
4160--------------4000
5230--------------5000

4000/5000*100=80%

Komal said: (Jul 3, 2011)  
please send me the fast calculation for (4160/5230*100) .

Raja Rai said: (Sep 26, 2011)  
4160*100/5230 = 79.541109 which is close to 80%.

Ashish said: (May 11, 2014)  
4160/5230 = 416/523.
100% = 523.
10% = 52.3.

70% = (50*7 + 2*7 +0.3*7).
= 350 + 14+ 2.1.
= 366.1.

So answer is greater than 70%.
80% = 50*8 + 2*8 + 0.3*8.
= 400 + 16 + 2.4.
= 418.4.

416 IS Little less than 418.4.

So answer is little less than 80%.
Thus 80% is correct approximation.

Do everything in mind .do not use pen and paper
You will be able to do it.

Sumaya Zama said: (Aug 22, 2014)  
We can easily calculate it by using @Rohit Agarwal sir's trick that is, Let us assume 4000 & 5000, the denominator is 5000 and what is 50% of 5000? its 2500 and we can split the numerator into 2500+1500 then it becomes 50%+...something,

Lets calculate the remaining part that is 1500 and what is 10% of 5000 its 500 then come to numerator and divide it into three parts that is 500+500+500 = 1500 that means 10%+10%+10%=30% then it becomes 30%and then add it to 50% which we got from 2500,

So we got 80% that means the answer is approx 80% because we are taking 4000 and 5000 instead of 4160 and 5230.

I hope this answer is sufficient. Thank you.

Preeths said: (Nov 22, 2014)  
Guys!

Easiest way to arrive at the answer would be :

= 4160 - rounded to 4000.
= 5230 - rounded to 5000.
= (4000*100) /5000.
= 400000/5000 = 400/5.

Which gives 80 as the answer.

Asra said: (May 8, 2015)  
Please send me simple calculation.

Anukriti Srivastava said: (Jun 29, 2015)  
Friends you give your expert sol but if we have done approximation and on one part of figure you have brought to its upper side, and other towards lower side as it is in this question.

And in answer figure one value of greater side of decimal being given other lower side after decimal then what will you choose then? Please help me out.

1699.99*299.88/59.8-1498+3745.

1.1900 2.11700 3.11000 4.10700 5.9800.

Though I can solve such type question, but they will consume much time. I want it to be done with speed as well as accuracy.

Mudasir Sultan From Davv Indore Soe said: (Dec 20, 2015)  
Very useful tricks many special thanks sir I am a maths student but I was not in a position to solve table based questions but now I find these are simple if one follows your tricks again special thanks from the core of my heart. May God bless you all with the highest success.

Lucky said: (Jan 4, 2016)  
@Pankaj sir trick is too useful & now I can solve these questions easily.

Happy said: (Jun 27, 2016)  
@Pankaj's and @Preeths method was the easiest way to get the answer. Thank you.

Kamal Dev said: (Jan 17, 2017)  
Your calculation is very simple. Thanks @Preeths.

Narayan said: (Jul 7, 2017)  
Well if U see.

97-12=85
87-10=77
78-8=70
88-10=78
64-7=57
So I found 85, so 2001.

Because 85 * 100> all the above.

Ashok Pasupuleti said: (Nov 11, 2017)  
I don't understand you are method sir @Narayan.

Sushma said: (Oct 4, 2018)  
Thanks for explaining this.

Ashu said: (Oct 5, 2019)  
Sir, fast calculations tricks.

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