Worksheet: Probability of Simple Events

In this worksheet, we will practice finding the probability of a simple event and write it as a fraction.

Q1:

A bag contains 7 white marbles, 8 black marbles, and 7 red marbles. If a marble is chosen at random from the bag, what is the probability that it is white?

  • A722
  • B729
  • C1522
  • D715

Q2:

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?

  • A718
  • B49
  • C56
  • D1118
  • E16

Q3:

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?

  • A12
  • B716
  • C916
  • D38
  • E58

Q4:

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

  • A2227
  • B34
  • C2027
  • D29
  • E79

Q5:

What is the probability of rolling an even prime number on a fair die?

  • A13
  • B34
  • C12
  • D16

Q6:

What is the probability of rolling an even number greater than 0 on a fair die?

  • A0
  • B1
  • C16
  • D12

Q7:

What is the probability of rolling a prime number which is less than 7 on a regular dice?

  • A12
  • B0
  • C13
  • D1

Q8:

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

  • A25
  • B12
  • C56
  • D35

Q9:

A deck of cards contains 26 cards numbered from 1 to 26. If a card is drawn at random, what is the probability of getting a card with a number greater than 26?

  • A0
  • B1
  • C2526
  • D126

Q10:

Cards in a deck are numbered from 1 to 86. If a card is chosen at random, what is the probability that the card has an odd number greater than 13?

  • A1229
  • B1843
  • C1943
  • D3786

Q11:

A card is drawn from a deck of cards numbered from 1 to 37. What is the probability that the number on the card is even?

  • A1837
  • B1937
  • C1
  • D1237
  • E1737

Q12:

Moataz wrote the names Omar, Ali, Yasser, Sandy, Ahmed, and Mahmoud on six different cards. What is the probability that a randomly chosen card will have a name that is 5 letters long?

  • A16
  • B27
  • C12
  • D13

Q13:

A deck of cards contains cards numbered 1 to 41. If a card is picked at random, what is the probability that the card picked carries an odd number greater than 35?

  • A1741
  • B2041
  • C441
  • D341
  • E2141

Q14:

A card is selected at random from a deck of cards numbered 1 to 55. What is the probability of the card having an even number which is divisible by 3?

  • A15
  • B956
  • C211
  • D955

Q15:

A card is selected from a deck of cards numbered 1 to 19. What is the probability that the card has an odd prime number?

  • A1019
  • B719
  • C12
  • D819

Q16:

What is the probability of selecting at random a prime number from the numbers 8, 9, 20, 19, 3, and 15?

  • A13
  • B0
  • C110
  • D1
  • E12

Q17:

A special fair die has faces with the numbers 19, 20, 21, 22, 23, and 24. What is the probability of rolling a prime number on this special die?

  • A13
  • B34
  • C16
  • D14

Q18:

A deck of cards numbered 1 to 15 is shuffled, and a card is chosen. What is the probability that the chosen card has a number which is divisible by 3 and 5?

  • A115
  • B715
  • C15
  • D13

Q19:

Which of the following could represent the probability of an event occurring?

  • A1913
  • B159
  • C149
  • D49

Q20:

A deck of cards contains cards numbered 6 to 16. If a card is drawn at random, what is the probability of getting a card with a prime number?

  • A311
  • B211
  • C316
  • D811

Q21:

A card is drawn at random from a set of cards with the numbers 1, 3, 9, 15, and 19. What is the probability that the card drawn has a number between 2 and 7?

  • A35
  • B1
  • C15
  • D25
  • E45

Q22:

Moataz wrote the names Mohamed, Mahmoud, Sara, Ahmed, Hala, and Youssef on six different cards. What is the probability that a randomly chosen card will have a name with more than 6 letters?

  • A37
  • B12
  • C13
  • D23

Q23:

Moataz wrote the names Sandy, Adel, Omar, Suzan, Yasser, and Hala on six different cards. What is the probability that a randomly chosen card will have a name with less than 6 letters?

  • A57
  • B56
  • C1
  • D23

Q24:

A deck of cards numbered 1 to 20 is shuffled, and a card is chosen at random. What is the probability that the chosen card has a number which is divisible by 2?

Q25:

What is the probability of selecting a vowel at random from the English alphabet?

  • Anone of the mentioned
  • B2126
  • C526
  • D121

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