Mathematics, 05.10.2020 14:01, Fatimaneedhelp

88. How many 4 digits numbers can be formed when a digit may be repeated any number
of times ?
(b) 4500
(c) 6000
(d) 9000
(a) 3000
( with full process)

Answers: 2

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88. How many 4 digits numbers can be formed when a digit may be repeated any number
of times ?...