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Find out number of permutations that can...

Find out number of permutations that can be had from the letters of the word ARRANGE
(i) Do the words starts with R.
(ii) Do the words begin with N and end in R ?

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  10. Evaluate : ""^(75)C(73)

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  13. If ""^(n)C(10)=""^(n)C(13) , then find the value of ""^(n)C(2)

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  14. If ""^(15)C(x)=""^(15)C(x+3) , then find the value of X.

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  15. Find ""^(18)C(3)+^(18)C(2)

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  16. Verify that ""^(9)C(5)+""^(9)C(4)=""^(10)C(5)

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  17. If .^(n)C(r-1): .^(n)C(r): .^(n)C(r+1)=3:4:5, find the values of n and...

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