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Words of a given length from the letters of a word with repeated letters

This type of question, asked 4 times: 31 Jan 2024, 8 Apr 2024, 29 Jan 2025, 23 Jan 2026 S1. All 4 questions below, oldest first.

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  1. Question 1

    31 Jan 2024

    83
    The total number of words (with or without meaning) that can be formed out of the letters of the word 'DISTRIBUTION' taken four at a time, is equal to

  2. Question 2

    8 Apr 2024

    155
    The number of ways five alphabets can be chosen from the alphabets of the word MATHEMATICS, where the chosen alphabets are not necessarily distinct, is equal to:

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  3. Question 3

    29 Jan 2025

    74
    The number of 6 -letter words, with or without meaning, that can be formed using the letters of the word MATHS such that any letter that appears in the word must appear at least twice, is 4  ______\ \_\_\_\_\_\_

  4. Question 4

    23 Jan 2026 S1

    75
    The number of 4-letter words, with or without meaning, which can be formed using the letters PQRPQRSTUVP, is ____\_\_\_\_.