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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 card is selected at random from a standard deck of 52 playing cards. What is the probability of drawing a King?

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 card is selected at random from a standard deck of 52 playing cards. What is the probability of drawing a King?

  1. 113
  2. 152
  3. 14
  4. 413
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Answer: A

There are 4 Kings in a deck of 52. P(King) = 452 = 113.

2. Two coins are tossed at the same time. Find the probability of getting at least one head.

  1. 34
  2. 12
  3. 14
  4. 1
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Answer: A

Sample space S = {HH, HT, TH, TT}, n(S) = 4. Outcomes with at least one H = {HH, HT, TH} (3 outcomes). P(At least 1 H) = 34.

3. 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.

4. What is the sample space S when rolling a fair six-sided die?

  1. {1, 2, 3, 4, 5, 6}
  2. {1, 3, 5}
  3. {2, 4, 6}
  4. {0, 1, 2, 3, 4, 5, 6}
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Answer: A

A fair six-sided die has faces numbered 1 through 6, so S = {1, 2, 3, 4, 5, 6} with n(S) = 6.

5. The probability that a target is hit is 0.85. If 200 shots are fired, how many shots are expected to hit the target?

  1. 170
  2. 150
  3. 160
  4. 180
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Answer: A

Expected count = Probability * Total trials = 0.85 * 200 = 170.

6. 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.

7. A spinner has 8 equal sections numbered 1 to 8. What is the probability of spinning a number greater than 5?

  1. 38
  2. 58
  3. 12
  4. 14
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Answer: A

Numbers greater than 5 are {6, 7, 8} (3 numbers). P(> 5) = 38.

8. A fair six-sided die is rolled. Find P(getting a number less than 7).

  1. 1
  2. 0
  3. 56
  4. 16
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Answer: A

All faces {1, 2, 3, 4, 5, 6} are less than 7. P(< 7) = 66 = 1 (a certain event).

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. 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.

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