Sets question.

- saifoo.khan

Sets question.

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- saifoo.khan

##### 1 Attachment

- mathslover

Try to draw a venn diagram first

- mathslover

Can you do that Saif ?

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## More answers

- mathslover

|dw:1365077901699:dw|

- saifoo.khan

I have already drawn it. Still unable to do it. :s

- mathslover

No problem. You would do it now.

- saifoo.khan

Only once you help me then i'll be able to do it.

- mathslover

It is given that 12 members are of athletics and drama both .
|dw:1365078073152:dw|

- saifoo.khan

|dw:1365078114787:dw|Now tell me that to do?!

- saifoo.khan

what*

- mathslover

Check that again! I think there is some fault.

- saifoo.khan

Where? In the question?

- mathslover

In the diagram. Drama and athletics = 12 members. and Drama and basket =19 . Have you reversed them?

- saifoo.khan

Nope.

- mathslover

You have marked drama and athletics as 19 members, right?

- saifoo.khan

No idea. :S @Mimi_x3

- mathslover

can't say mimi ... as I prefer to solve these type of questions by venn diagrams. It makes understanding better.

- mathslover

|dw:1365078569066:dw|

- saifoo.khan

Ohh. I wrote it wrong here. On the paper it's in the right order.

- amistre64

you should start in the middle and work your way outwards

- mathslover

Yes thought the same Saif.

- saifoo.khan

|dw:1365078648571:dw|

- saifoo.khan

How? @amistre64

- amistre64

12 students total are in BOTH A and D, we already know 5 of them, whats left? 12 - 5 = ?

- mathslover

Now we will exclude the all three three club members from the common areas .

- mathslover

Yep the one amistre suggested.

- amistre64

we know 13 total are in BOTH, B and A. and we already know of 5 of them, 13 - 5 = ?

- saifoo.khan

Sorry. Don't get it. :/ @amistre64

- saifoo.khan

How we already know 5 of them?

- mathslover

|dw:1365078755446:dw| the boundary I drew has 12 members. Right?

- saifoo.khan

right

- amistre64

|dw:1365078760078:dw|

- mathslover

Saif, we know that there are 5 members in common with all the three clubs.
teenon club mein 5 members to common hain hi ? right?

- amistre64

|dw:1365078840934:dw|

- amistre64

|dw:1365078870777:dw|

- mathslover

Now we have the intersection of athletics and drama as : 5 + something = 12 .. getting it?

- saifoo.khan

http://i3.kym-cdn.com/entries/icons/original/000/009/993/tumblr_m0wb2xz9Yh1r08e3p.jpg

- saifoo.khan

I totally get that subtraction thing. Whats next?

- mathslover

Good.

- amistre64

you are given the top level values, the venn has 4 sections for each top level, 3 of which are known.
keep working the solution in the same manner

- mathslover

May I interupt with a diagram ?

- amistre64

|dw:1365079086252:dw|

- mathslover

|dw:1365079147638:dw|

- amistre64

|dw:1365079189518:dw|

- saifoo.khan

Nice work @amistre64 and @mathslover . Leave rest of me.
Thanks a lot. (:

- mathslover

I would stop myself now. Amistre, continue.

- amistre64

good luck ;)

- mathslover

You're welcome!

- saifoo.khan

Thank you!

- mathslover

@saifoo.khan , there is a better explanation there : http://www.mathsisfun.com/sets/venn-diagrams.html
. Just have a look there.

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