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🎲 Chapter 7: The Mathematics of Maybe: Introduction to Probability • Exercise Set 7.1

Verified step-by-step solutions for your class notes.

Q1

Rank the following events on a scale from 0 (Impossible) to 1 (Certain). Label each event: Impossible, less likely, equally likely (even chance), more likely, certain. Give reasons why you gave each event its ranking.

  • (i) The next Monday will come after Sunday.
  • (ii) It will snow in Mumbai in July.
  • (iii) An elephant will walk through your classroom today.
  • (iv) You will greet at least one friend at school tomorrow.
  • (i) Certain (1): The days of the week are defined in a fixed order, so Monday always follows Sunday.
  • (ii) Impossible (0): Mumbai has a tropical climate and it is currently monsoon season in July; it never snows there.
  • (iii) Impossible (0): Schools are not habitats for elephants, making this scenario practically impossible.
  • (iv) More likely (closer to 1): Assuming you attend school regularly and have friends, it is highly probable you will greet one, though not absolutely guaranteed (e.g., you might be absent).