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Mathematics · JEE | PERMUTATIONS AND COMBINATIONS
हिन्दीIf \( {^n\text{P}_5} = 42 \, {^n\text{P}_3} \), where \( n > 4 \), find the value of \( n \).
View Answer & Solution
Correct answer · Option A
10
Explanation
Expanding gives \( (n-3)(n-4) = 42 \), leading to \( n^2 - 7n - 30 = 0 \), yielding \( n = 10 \).
