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NAAn MAango ALlah SE Pepsi Cola
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well i know a gud one that's easy to memorise for Na Mg Al Si P S ClNAAn MAango ALlah SE Pepsi Cola
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Find the no. of two digit numbers so that no two are EQUIVALENT.

two n-digit nos are eq  if one is  a perm of other

eg 10789 and 98701 are eq

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i think 24

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grt!
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i know that but can u do the two of them here  since i am getting it wrong

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!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!11

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????????????????

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It basically means that if there are n items and u have to put them in (n-1) boxes then at least one box must have more than one item.

this is very useful

Here's a practical problem

for eg if u want to prove that there are at least two animals in world having same amt. of hair then u can use this principle to prove it

1.let's get the average no of hairs on animal body(n2)

2, then no of animals(n1)

now If n1>n2 then atleast two animals will have same amt of hair on theor body

It basically means that if there are n items and u have to put them in (n-1) boxes then at least one box must have more than one item.

this is very useful

Here's a practical problem

for eg if u want to prove that there are at least two animals in world having same amt. of hair then u can use this principle

http://en.wikipedia.org/wiki/Pigeonhole_principle

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Earlier there was an accept answer option for community questions but i'm not able to see it now?What has happened to it?Has it been removed?

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how do you calculate bond order of Co2,Na2o2? Pls explain!

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so Mr.KNOW IT ALL please prove it here

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What is biort sawart's law?

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is there any proof for (x+y)^n?

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what will be the rank of word great if all the permutations of letters of the word(only 5 letter words) great are arranged im dictionary order?  {repetition of alpha. is not allowed }

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what is sgn(x)?

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what are optical fibres and what is the prinicipal used?

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