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Quiz Chapter 13: Simple Probability

10 questions ยท Form 2 Mathematics Bab 13: Simple Probability

Question 1 of 10Score: 0

A letter is chosen at random from the word 'MALAYSIA'. What is the probability of selecting the letter 'A'?

Full Question List & Answer Key

Prefer reading to quizzing? All 10 questions are listed below with the answer and explanation under each one.

1. A letter is chosen at random from the word 'MALAYSIA'. What is the probability of selecting the letter 'A'?

  1. 38
  2. 18
  3. 28
  4. 48
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Answer: A

Word length n(S) = 8. 'A' appears 3 times. P('A') = 38.

2. A fair die is rolled. Find the probability of getting a prime number.

  1. 0.5
  2. 0.33
  3. 0.67
  4. 0.17
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Answer: A

Prime numbers on a die are 2, 3, 5 (3 favorable outcomes). P(Prime) = 36 = 0.5.

3. A box contains 12 dark chocolates and some milk chocolates. If the probability of choosing a dark chocolate is 35, how many milk chocolates are in the box?

  1. 8
  2. 20
  3. 15
  4. 10
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Answer: A

P(Dark) = 12 / Total = 35 => Total = 20. Milk chocolates = 20 - 12 = 8.

4. A basket contains 30 apples. The probability of picking a rotten apple is 16. How many rotten apples are in the basket?

  1. 5
  2. 6
  3. 25
  4. 10
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Answer: A

Number of rotten apples = 30 * (16) = 5.

5. What is the probability of getting a sum of 13 when two fair six-sided dice are rolled simultaneously?

  1. 0
  2. 136
  3. 112
  4. 16
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Answer: A

The maximum possible sum when rolling two dice is 6 + 6 = 12. Getting 13 is impossible, so probability is 0.

6. A bag contains cards numbered 1 to 15. What is the probability of selecting a square number?

  1. 15
  2. 415
  3. 13
  4. 215
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Answer: A

Perfect square numbers between 1 and 15 are {1, 4, 9} (3 numbers). P(Square) = 315 = 15.

7. A bag contains 5 red balls, 3 blue balls, and 2 green balls. What is the probability of drawing a blue ball?

  1. 0.3
  2. 0.5
  3. 0.2
  4. 0.8
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Answer: A

Total balls n(S) = 5 + 3 + 2 = 10. Blue balls n(Blue) = 3. P(Blue) = 310 = 0.3.

8. What is the value of P(A') if P(A) = 0.35?

  1. 0.65
  2. 0.35
  3. 1.35
  4. -0.35
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Answer: A

Complement rule: P(A') = 1 - P(A) = 1 - 0.35 = 0.65.

9. If an event is impossible to occur, what is its probability?

  1. 0
  2. 1
  3. 0.5
  4. -1
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Answer: A

The probability of an impossible event is always 0.

10. Which of the following values cannot represent the probability of an event?

  1. 1.25
  2. 0.75
  3. 0
  4. 45
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Answer: A

Probability values must be between 0 and 1 inclusive (0 <= P <= 1). 1.25 exceeds 1.

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