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Class 11MathematicsPermutations and CombinationsPermutationsEasy
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In how many ways can (3) questions from (9) questions be solved in first, second and third order?

Answer and explanation

Correct answer: (504)

The solving order matters, so ({}^{9}P_{3}=9\times8\times7=504). Use permutation in ordered selection.

Related tags

PermutationsClass11EasyPermutations And CombinationsMathematicsClass 11 Mcq
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