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Of the 200 candidates who were interviewed for a position at a call
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14 Mar 2016, 07:13
Question Stats:
66% (02:27) correct 34% (02:50) wrong based on 176 sessions
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Re: Of the 200 candidates who were interviewed for a position at a call
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14 Mar 2016, 07:23
Bunuel wrote: Of the 200 candidates who were interviewed for a position at a call center, 100 had a twowheeler, 70 had a credit card and 140 had a mobile phone. 40 of them had both, a twowheeler and a credit card, 30 had both, a credit card and a mobile phone and 60 had both, a two wheeler and mobile phone and 10 had all three. How many candidates had none of the three?
A. 0 B. 10 C. 18 D. 20 E. 25 Apply the formula for n(AUBUC) You get 190. 200190 = 10



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Of the 200 candidates who were interviewed for a position.......
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05 Feb 2017, 05:32
Of the 200 candidates who were interviewed for a position at a call center, 100 had a twowheeler, 70 had a credit card and 140 had a mobile phone. 40 of them had both, a twowheeler and a credit card, 30 had both, a credit card and a mobile phone and 60 had both, a two wheeler and mobile phone and 10 had all three. How many candidates had none of the three? (1) 0 (2) 20 (3) 10 (4) 18 (5) 05



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Re: Of the 200 candidates who were interviewed for a position at a call
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05 Feb 2017, 05:35



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Re: Of the 200 candidates who were interviewed for a position at a call
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05 Feb 2017, 21:02
Hi Bunuel, I got the correct answer by chance. I did not get the meaning of the question correctly and I seem to be dissatisfied by the approach I followed. Can you please point out mistake in my approach and/or suggest a better,more efficient way? total candidates = 200. So, A U B U C = 200. 100 = A ; 70= B; 140 = C. 40 = A n B (using n to denote intersection) 30 = B n C 60 = A n C 10 = A n B n C Using AUBUC = A + B + C  {A n B + B n C + C n A} + A n B n C I get 200 = 190. So I guess there is a gap of 10 somewhere. So let me go with 10. Bunuel wrote: praveen27sinha wrote: Of the 200 candidates who were interviewed for a position at a call center, 100 had a twowheeler, 70 had a credit card and 140 had a mobile phone. 40 of them had both, a twowheeler and a credit card, 30 had both, a credit card and a mobile phone and 60 had both, a two wheeler and mobile phone and 10 had all three. How many candidates had none of the three? (1) 0 (2) 20 (3) 10 (4) 18 (5) 05 Merging topics. Please refer to the discussion above.



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Re: Of the 200 candidates who were interviewed for a position at a call
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12 Mar 2018, 15:38
Bunuel wrote: Of the 200 candidates who were interviewed for a position at a call center, 100 had a twowheeler, 70 had a credit card and 140 had a mobile phone. 40 of them had both, a twowheeler and a credit card, 30 had both, a credit card and a mobile phone and 60 had both, a two wheeler and mobile phone and 10 had all three. How many candidates had none of the three?
A. 0 B. 10 C. 18 D. 20 E. 25 We can create the equation: Total = twowheeler + credit card + mobile phone  doubles + triple + neither 200 = 100 + 70 + 140  (40 + 30 + 60) + 10 + n 200 = 310  130 + 10 + n 200 = 190 + n 10 = n Answer: B
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Re: Of the 200 candidates who were interviewed for a position at a call
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30 Mar 2018, 06:00
Bunuel wrote: 40 of them had both, a twowheeler and a credit card, 30 had both, a credit card and a mobile phone and 60 had both, a two wheeler and mobile phone and 10 had all three. How many candidates had none of the three? Question: how do you realize when the statement is about exactly 2 overlapping sets, and when about at least two? I find it a bit difficult sometimes. Of course I'm not talking about obvious examples, but like the one here, I took it as "exactly", just to realize later that Formula 2 give result that it's not among the answers, so then I had to redo my math with the other formula. Any advice/ rule of thumb?



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Re: Of the 200 candidates who were interviewed for a position at a call
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30 Mar 2018, 06:24
wengiel wrote: Question: how do you realize when the statement is about exactly 2 overlapping sets, and when about at least two? I find it a bit difficult sometimes. Of course I'm not talking about obvious examples, but like the one here, I took it as "exactly", just to realize later that Formula 2 give result that it's not among the answers, so then I had to redo my math with the other formula. Any advice/ rule of thumb? hey wengiel , Welcome to GMATClub Basically you are looking for this link. If you are not given exactly two, don't assume. More details in the link I shared.
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Re: Of the 200 candidates who were interviewed for a position at a call &nbs
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