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IMAS 2011 — Upper Primary Grades 5–6 — Round 1 Question 10

IMAS · IMAS 2011 — Upper Primary Grades 5–6 — Round 1

Question 10

The box contains 20 balls numbered from 1 to 20, but identical otherwise. Eve draws a ball at random from the box. Which of the following outcome is the most likely?
  1. drawing the ball numbered 11.
  2. drawing balls that are of even number.
  3. drawing balls that ended with the digit 5, 6, 7, 8.
  4. drawing balls that contain the digit 1.
  5. drawing balls with a one-digit number.