Elitmus Exam Category

Guyzzz Pls help me ...i just wanna know...kitna ques ata h ahr kissi ne elitmus ki practice yahan se ki h

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Elitmus Other Question

There is a 3*3 grid,9squares are to be attached with stickers.There are3 red and 6 white stickers.each and every square needs a sticker. In how many ways the squares can be attached with stickers
Option
1)9c3
2)9c3+6c3
3)9c3/3!
4)(9c3+6c3)/3!
How many pages of this site will be sufficient for e litmus?