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In a poll, 200 subscribers to Financial Magazine X indicated
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26 Jun 2020, 09:41
26 Jun 2020, 09:41
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57% (02:02) correct
42% (01:22) wrong based on 87 sessions
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In a poll, 200 subscribers to Financial Magazine X indicated which of five specific companies they own stock in. The results are shown in the table above. If 15 of the 200 own stock in both IBM and AT&T, how many of those polled own stock in neither company?
(A) 63
(B) 93
(C) 107
(D) 122
(E) 137
Re: In a poll, 200 subscribers to Financial Magazine X indicated
[#permalink]
22 Oct 2020, 15:09
22 Oct 2020, 15:09
5
Sometimes it isn't that easy to notice when, but the entire problem could also be solved using the equation:
A + B - both + neither = total.
The first thing I tend to look for in overlapping sets problems is if this is applicable right away.
In this scenario, you're given A an B and you're given 'both' (15) and you're asked to find 'neither'.
Set up the equation, let A = AT&T and B = IBM.
30 + 48 - 15 + x = 200
X = 137, and it took like 20 seconds to do and not much thinking, this approach may not work for all of these problems so definitely be cautious when using it.
A + B - both + neither = total.
The first thing I tend to look for in overlapping sets problems is if this is applicable right away.
In this scenario, you're given A an B and you're given 'both' (15) and you're asked to find 'neither'.
Set up the equation, let A = AT&T and B = IBM.
30 + 48 - 15 + x = 200
X = 137, and it took like 20 seconds to do and not much thinking, this approach may not work for all of these problems so definitely be cautious when using it.
General Discussion
Re: In a poll, 200 subscribers to Financial Magazine X indicated
[#permalink]
26 Jun 2020, 09:42
26 Jun 2020, 09:42
Expert Reply
Post A Detailed Correct Solution For The Above Questions And Get A Kudos.
Question From Our New Project: GRE Quant Challenge Questions Daily - NEW EDITION!
Question From Our New Project: GRE Quant Challenge Questions Daily - NEW EDITION!
