SATHEE: Permutations And Combinations Question 88

Permutations And Combinations Question 88

Question: If $ 2\times {}^{n}C_5=9\times {}^{n-2}C_5 $ , then the value of n will be

Options:

A) 7

B) 10

C) 9

D) 5

Show Answer

Answer:

Correct Answer: B

Solution:

By inspection $ n=10 $ .

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Permutations And Combinations Question 88

Question: If $ 2\times {}^{n}C_5=9\times {}^{n-2}C_5 $ , then the value of n will be

Options:

Answer:

Solution:

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