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If ""^(43)C(r-6) =""^(43)C(3r+1), then t...

If `""^(43)C_(r-6) =""^(43)C_(3r+1),` then the value of r is-

A

10

B

12

C

8

D

6

Text Solution

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The correct Answer is:
B
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CHHAYA PUBLICATION-MCQ's-QUESTION PAPER 4
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  2. The two geometric means between 1 and 64 are-

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  3. If ""^(43)C(r-6) =""^(43)C(3r+1), then the value of r is-

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  4. The number of ways in which 5 boys and 3 girls can be seated in a row ...

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  8. If ""(n)C(r) denotes the number of combinations of n different things ...

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  9. If n is a natural number then (12 ^(n) + 25 ^(n-1)) is divisible by-

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  10. If |z-4| lt |z-2|, where z is a complex number, then its solution is-

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  11. The sum to n terms of the series [1. (1!)+2. (2!)+ 3.(3!)+…] is-

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  15. If x is real and (x+5)/(x-2)le0, state which of the following is true-

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