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Permutation and Combinations — MATHS STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceMATHSPermutation and Combinations1 Mark
MCQ
Value of 0! is always 1:
  • A
    True
  • B
    False
  • C
    Either
  • D
    Neither
✓

Answer

  1. True

Solution:

we know 1! = 1

Also n! = n × (n − 1) × (n − 2)........3 × 2 × 1n! = n × (n − 1)! 1 ! = 1(1 − 1)! 1 = 1(0)! 0 ! = 1

0! is always 1

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