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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. `12` b. `8` c. `6` d. 10 e. 14

A

6

B

8

C

10

D

12

Text Solution

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The correct Answer is:
D
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ARIHANT MATHS ENGLISH-PERMUTATIONS AND COMBINATIONS -Exercise For Session 4
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  11. If .^(n)P(3)+.^(n)C(n-2)=14n, the value of n is (a) 5 (b) 6 (c) 8 (d)...

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