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Class 11MathematicsPermutations and CombinationsDefinition of permutation, Number of permutations with or without repetition, Conditional permutations
Easy

Six identical coins are arranged in a row. The number of ways in which the number of tails is equal to the number of heads is

  • A
    $20$
  • B
    $9$
  • C
    $120$
  • D
    $40$
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Class 11 Questions

Class 11

Mathematics Questions

Chapter

Permutations and Combinations

Subtopic

Definition of permutation, Number of permutations with or without repetition, Conditional permutations

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