Boy Mow Chau's answer to Elaine's Junior College 1 H2 Maths Singapore question.
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If question says how many 3-letter words can be formed, then order of letters is important.
If question says how many 3-letter selections can be made, then order of letters is not important.
Selecting AAE is same as AEA & EAA.
If question says how many 3-letter selections can be made, then order of letters is not important.
Selecting AAE is same as AEA & EAA.
Date Posted:
5 years ago
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