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The word (LEVEL) has (5) letters, with (L) twice and (E) twice. How many distinct arrangements are possible?

Answer and explanation

Correct answer: (30)

The word LEVEL contains five positions, but L is repeated twice and E is repeated twice. If all five letters were temporarily treated as different, there would be \(5!\) arrangements. However, interchanging the two Ls does not create a new visible word, and the same is true for the two Es. We must therefore divide by \(2!\) for each repeated letter.

The number of distinct arrangements is \(\frac{5!}{2!2!}=\frac{120}{4}=30\). The repeated letter V occurs only once and needs no division. Therefore choice C, (30), is correct. Counting \(5!=120\) would count identical-letter interchanges repeatedly.

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PermutationsClass11Easy

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