Permutation & Combination

Permutation & Combination (Question)

You are asked to arrange the letters of “GEEEKL” differently.

  1. How many different ways the words can be arranged in a row?
  2. How many ways of arrangement that all three letters of “E” are not together?


Permutation Formula
This formula calculates the number of permutations of n things taken r at a time

Combination Formula
This formula calculates the number of combinations of n things taken r at a time

Number of permutations of n things when there are n1, n2, …, nk repeated items.

Permutation & Combination (Answer)

  1. 20
  2. 14

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O-level Math & JC Math Tuition Singapore - Permutation & Combination
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