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Question
If `((11 - "n")!)/((10 - "n")!) = 9,`then n = ______.
Options
16
8
12
2
MCQ
Fill in the Blanks
Solution
If `((11 - "n")!)/((10 - "n")!) = 9,`then n = 2.
Explanation:
`((11 - "n")!)/((10 - "n")!) = 9`
`=> ((11 - "n")(10 - "n")!)/((10 - "n")!)` = 9
⇒ n = 2
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Factorial Notation
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