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If n = 5, then (""^(n)C(0))^(2)+(""^(n)C...

If n = 5, then `(""^(n)C_(0))^(2)+(""^(n)C_(1))^(2)+(""^(n)C_(2))^(2)+......+(""^(n)C_(5))^(2)` is equal to

A

250

B

254

C

245

D

252

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The correct Answer is:
D
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NEW JOYTHI PUBLICATION-PERMUTATIONS AND COMBINATIONS-QUESTIONS FROM COMPETITIVE EXAMS
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  9. Total number of four digit odd numbers that can be formed using 0, 1, ...

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  10. Evaluate the following: ""^(10)C(9)=

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  11. The number of positive integers less than 40,000 that can be formed by...

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  12. If ""^(56)P(r+6):""^(54)P(r+3)=30800:1, then the value of r is

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  13. From 12 books, the difference between number of ways a selection of 5 ...

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  14. If (n+2)!=2550timesn! then the value of n is ………………….. .

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  15. 10C0=

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  16. The number of integers greater than 6000 that can be formed with 3, 5,...

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  18. There are 10 persons including 3 ladies. A committee of 4 persons incl...

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  19. If ""^(n)C(3)=10, then n is

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