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THANK YOU SO MUCH!! I were struggling to understand this (binomial page really worked)

**Abbas0000**- Replies: 2

You have 3 children in a family . What is the probability of having 2 girls ?

I've confuesd . I've tryed this method but I don't know why it is not working!

First for n(s) we can say 2*2*2 (every child have two possibility)so it equals 8 then for n(a) we can say because we want 2 girls so 2 children would have just one possibility namely , 1*1*2 then it would equal to 2. But if you write down every possibilty it would be 3! My approach is the same thing for calculating sub sets of some (X) set that is n(s), and for n(A) as I've mentioned . So if ANYONE knows what's wrong or know a better way than write down all possibilties you can make me delighted by leaving it in the comment! THANK YOU;-)

**Abbas0000**- Replies: 1

I red somewhere about adding vectors would result in zero or nothing if they have these rules applied on them :

if there's a collection of vectors that all of them have the same length and any vector have equivalent degree between it-self and its adjacent one and sum of all degrees are 360 degrees then resultant vector would zero .

how's that possible ? please if anyone knows a proof write it below. thank you

Thanks a lot !!:-)

**Abbas0000**- Replies: 6

Why something with negative exponent or a variable at denominator is not allowed to be called polynomial?(I know the rules of polynomial but I don't know why )

Thanks for your answering.

Nearly??

Without question marks

Thanks

**Abbas0000**- Replies: 10

Hi guys,I'm abbas from iran 14years and I was just searching for maths sites and suddenlly discoverd this amazing site.I had a question. What is algorithm and its usement and the field we can use it in maths? THANK YOU ALL

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