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Arrangements of digits with repeats under a place or parity condition

This type of question, asked 2 times: 24 Jan 2023, 30 Jan 2023. All 2 questions below, oldest first.

Try each one first, then open its answer.

  1. Question 1

    24 Jan 2023

    86
    The number of 9-digit numbers, that can be formed using all the digits of the number 123412341 so that the even digits occupy only even places, is
  2. Question 2

    30 Jan 2023

    180
    The number of seven digits odd numbers, that can be formed using all the seven digits 1,2,2,2,3,3,51,2,2,2,3,3,5 is