permutations and combinations question...

[gilded prairie]

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[soft vapor]

Which set do you have problem in

@edgy spruce

[edgy spruce]

@soft vapor actually I'm having problem in understanding the question

[soft vapor]

Oh ok

Let me assist

In the first case i have to choose any three numbers with repition

That means suppose i take i j k as three blank spaces

I can fill these blank spaces with number from the set (1,2,3,4.....10)

Also there is no restriction on how

@edgy spruce

So now can youbtry first set