Question

7.1
when the digits may be repeated ?
7. How many four digit numbers can be formed with the digits 1, 2, 3, 4, 5, 6 when a digit
may be repeated any number of times in any arrangement?​

Answer 1

Answer:

Answer is 840! This is a question of permutation and combination. We have to make 4 digit number without repetition using 1,2,3,4,5,6,7.

Step-by-step explanation:

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