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Worksheet: Finding the Probability of a Simple Event

Q1:

State whether it is impossible, certain, or possible for it to rain gold.

  • Aimpossible
  • Bcertain
  • Cpossible

Q2:

If a coin is flipped once, what is the probability of getting a tail?

  • A
  • B
  • C
  • D

Q3:

A box contains 7 white balls, 3 black balls, and 8 red balls. What is the probability that a ball drawn at random is black?

  • A
  • B
  • C
  • D
  • E

Q4:

Which outcome is most likely when spinning the arrow on this spinner?

  • AS
  • BR
  • CP
  • DQ

Q5:

When this spinner is spun, which of the following describes the probability that the arrow lands on a sector that is NOT yellow?

  • Aimpossible
  • Bequally likely that it happens or does not happen
  • Cunlikely
  • Dcertain
  • Elikely

Q6:

A card is selected at random from a pack of 16 cards which are numbered 1 to 16. What is the probability of the selected card having an even number?

  • A
  • B
  • C
  • D
  • E

Q7:

What is the probability of rolling an even number greater than 1 on a fair die?

  • A
  • B
  • C
  • D

Q8:

If an event has a chance of occurring, what is the probability that it does not occur?

Q9:

Given that the probability of an event occurring is , what is the probability of the event not occurring?

  • A
  • B
  • C
  • D1

Q10:

A class contains 6 boys and 21 girls. If a pupil is selected at random, what is the probability they are a girl?

  • A
  • B
  • C
  • D
  • E

Q11:

What is the probability of selecting at random an even number from the numbers 12, 13, 6, 11, 2, and 8?

  • A
  • B
  • C
  • D

Q12:

If a letter is selected at random from the word “laboratory”, what is the probability of selecting “o”?

  • A
  • B
  • C
  • D

Q13:

If the probability of an event occurring is , what is the probability that it does not occur?

  • A
  • B
  • C
  • D

Q14:

If the probability that a student passes in mathematics is 0.7, what is the probability that the student fails?