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Overlapping sets formula with 3 three groups

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Overlapping sets formula with 3 three groups  [#permalink]

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New post 12 Sep 2016, 12:55
Hi,

Can anyone kindly verify if I have the correct formula for 3 groups venn diagram or not?

The groups are : A, B, C

Total unique participants= A + B + C - AB - BC- AB -2ABC + none of ABC

Thanks,
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Re: Overlapping sets formula with 3 three groups  [#permalink]

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New post 12 Sep 2016, 16:13
I've noticed on practice questions ( and I remember one question on the exam) where they give the number in both sets rather than a&b a&c. But yes I think of it as
g1+g2+g3-(number in both groups)-2(number in three groups)+neither=total
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Re: Overlapping sets formula with 3 three groups  [#permalink]

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New post 12 Sep 2016, 20:21
Thanks. I remember getting a 3 set question in my exam and I forgot to multiply the 'all the three groups' with 2.
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Re: Overlapping sets formula with 3 three groups  [#permalink]

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New post 13 Sep 2016, 02:20
ruggerkaz wrote:
Hi,

Can anyone kindly verify if I have the correct formula for 3 groups venn diagram or not?

The groups are : A, B, C

Total unique participants= A + B + C - AB - BC- AB -2ABC + none of ABC

Thanks,


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Re: Overlapping sets formula with 3 three groups  [#permalink]

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New post 13 Sep 2016, 03:36
ruggerkaz wrote:
Hi,

Can anyone kindly verify if I have the correct formula for 3 groups venn diagram or not?

The groups are : A, B, C

Total unique participants= A + B + C - AB - BC- AB -2ABC + none of ABC

Thanks,
it's correct, but I did not memorize the formula, it's not hard to evaluate


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Re: Overlapping sets formula with 3 three groups  [#permalink]

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New post 30 Mar 2018, 22:37
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: Overlapping sets formula with 3 three groups &nbs [#permalink] 30 Mar 2018, 22:37
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