Find the number of 4 letter words, with or without meaning which can be formed out of the letters of the word ROSE when the repetitions of the letters is not allowed

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Solution

Number of letters $= 4$
$∴$ permutation $= 4 \times 3 \times 2 \times 1 = 4! = 24$ words

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Find the number of 4 letter words, with or without meaning which can be formed out of the letters of the word ROSE when the repetitions of the letters is not allowed

Number of letters =4∴ permutation =4×3×2×1=4!=24 words

Number of letters $= 4$
$∴$ permutation $= 4 \times 3 \times 2 \times 1 = 4! = 24$ words