The number of different signals which can be given from 7 different coloured sheets, taking one or more at a…

The number of different signals which can be given from 7 different coloured sheets, taking one or more at a time is
  1. 127
  2. 5913
  3. 13699
  4. 13700

Solution

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Asked in: AP EAMCET 2017 (24 Apr Shift 1)

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