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General
Easy

Question

Let B={p, q, r, .....} and let two binary operations be denoted by ‘logical or' and ‘logical and’ or ‘+’ or ‘.’, then

  1. a logical and left parenthesis a logical or b right parenthesis equals b    
  2. a logical and left parenthesis a logical or b right parenthesis equals a    
  3. a logical and left parenthesis a logical or b right parenthesis equals 0    
  4. None of these    

The correct answer is: a logical and left parenthesis a logical or b right parenthesis equals a


    a logical and left parenthesis a logical or b right parenthesis equals a logical and a logical or a logical and b.
    equals a logical and 1 logical or a logical and b equals a logical and left parenthesis 1 logical or b right parenthesis equals a logical and 1 equals a.

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