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nCr formula is used when things are distinct. How do we recognise that all the socks of one colour are distinct?

The videos of any section, say Geometry, doesn't show up in proper sequence in mobile app

Find the no. of arrangements of the letters of the word METROORTEM.

A committee of four persons is to be selected from 8 computer engineers and 3 mechanical engineers so as to include at least one mechanical engineers. The possible no. of ways are?

Sir, can I use angle=arc length/radius formula to the following sum? If not, why? Can  u plz explain sir?

When pendulum of length 50cm oscillates, it produces an arc of 16cm. The angle so formed in degree measure is (approx)

The letters of the word endeavor are arranged in all possible ways.The no. of arrangements when A and V are not together are?

out of 6 different science books and 4 diff maths books in how many ways can we select 4 books if 2 of each are necessary?

out of 6 different science books and 4 diff maths books in how many ways can we select 4 books if 2 of each are necessary?

Can any tell me.. How to curtail faults in during RC?

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