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In a certain code: 'P & Q' means P is greater than Q; 'P * Q' means P is less than Q; 'P = Q' means P is equal to Q. If 'A & B', 'B = C' and 'C * D' are all true, which of the following is definitely true?

Competition practiceInequalities
  • AA is greater than D.
  • BB is greater than D.
  • CA is less than C.
  • DD is greater than B.

Step-by-Step Solution

A & B means A > B, B = C means B = C, C * D means C < D. Since D > C and B = C, D > B is certain. The relation between A and D is not fixed.
Answer: D) D is greater than B.

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