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How many odd five-digit counting numbers can be formed by choosing digits from the set {1, 2, 3, 4, 5, 6, 7, 8}  if digits can be repeated?

 Jun 19, 2021
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Digits = 1, 2, 3, 4, 5, 6, 7, 8 and can be repeated. 

1's digit has = 4 possibilities

Rest all digits have 8 possibilities 

 

No. of 5-digit numbers = 8 × 8 × 8 × 8 × 4 = 16384

 Jun 19, 2021

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