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Question

Digits can get repeated?
  1. 765
  2. 432
  3. 312
  4. 864
  5. 874


Solution

The correct option is D 864

When the repetition is allowed:

All the places: Hundred’s, ten’s and unit’s can be filled by any of the digits: 2, 3, 5, 6, 7 or 8 i.e. in 6 ways. Thousand’s place can be filled only in 4 ways. Hence no. numbers possible = 4*6*6*6 = 864.

Hence option (d)

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