2010 JJC P2 Q5
2010 JJC P2 Q5
4 marks
Prelims
From the letters of the word DISTRIBUTION, find
- the number of 4-letter code-words that can be formed if the code-word contains exactly three ‘I’s.[2]
- the number of code-words that can be formed using all the letters such that all the three ‘I’s are separated.[2]
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Answer:(i) \(32\) (ii) \(21\,772\,800\)
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