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IKMC 2027 - Grades 11-12 - Self-study SET 7 - Thematic Batch 3 Question 14

IKMC · IKMC 2027 - Grades 11-12 - Self-study SET 7 - Thematic Batch 3

Question 14

Mary has black and white balls. Let n be the total number of balls and d the number of black balls minus the number of white balls. Which statement is true?

Question illustration
  1. Both n and d are even
  2. Both n and d are odd
  3. One of n,d is even and the other odd
  4. n and d have the same parity
  5. All the preceding conclusions are incorrect