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Permutation and Combinations — MATHS STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceMATHSPermutation and Combinations1 Mark
MCQ
Given 5 flags of different colours, how many different signals can be generated, if each signal requires the use of 2 flags, one below the other:
  • A
    18
  • B
    20
  • C
    19
  • D
    23 
✓

Answer

  1. 20

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