Why is the numbers of ways of arranging the letters of CALL is less than the number of ways of arranging the letters of BARK? Explain your a

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Why is the numbers of ways of arranging the letters of CALL is less than the number of ways of arranging the letters of BARK? Explain your answer

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Khải Quang 5 months 2021-08-21T06:56:43+00:00 1 Answers 0 views 0

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    2021-08-21T06:58:32+00:00

    Answer:

    See Explanation

    Step-by-step explanation:

    Given

    (1) CALL and (2) BARK

    Required

    Why is the number of arrangement of (1) less than (2)

    The reason is that in (1), letter L occurred twice. When there is a repetition of letters, the number of ways of arrangement reduces

    For (1)

    There are 4 letters and L is repeated twice.

    Arrangement = \frac{4!}{2!}

    Arrangement = \frac{24}{2}

    Arrangement = 12

    For (2)

    There are 4 letters and no repetition

    Arrangement = 4!

    Arrangement = 24

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )