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Conditional Probability

Description: This quiz covers the concept of conditional probability, which is the probability of an event occurring given that another event has already occurred.
Number of Questions: 15
Created by:
Tags: probability conditional probability bayes' theorem
Attempted 0/15 Correct 0 Score 0

What is the probability of rolling a 6 on a standard six-sided die?

  1. 1/6

  2. 1/2

  3. 1/3

  4. 1/4


Correct Option: A
Explanation:

There are 6 possible outcomes when rolling a die, and only one of them is a 6. Therefore, the probability of rolling a 6 is 1/6.

What is the probability of drawing a heart from a standard deck of 52 cards?

  1. 1/4

  2. 1/2

  3. 1/3

  4. 1/13


Correct Option: D
Explanation:

There are 52 cards in a standard deck, and 13 of them are hearts. Therefore, the probability of drawing a heart is 13/52, which simplifies to 1/4.

What is the probability of rolling a 6 on a standard six-sided die, given that the die has already landed on an even number?

  1. 1/3

  2. 1/2

  3. 1/4

  4. 1/6


Correct Option: A
Explanation:

There are 3 even numbers on a standard six-sided die (2, 4, and 6), and only one of them is a 6. Therefore, the probability of rolling a 6, given that the die has already landed on an even number, is 1/3.

What is the probability of drawing a heart from a standard deck of 52 cards, given that the card is a face card (jack, queen, or king)?

  1. 1/3

  2. 1/2

  3. 1/4

  4. 1/6


Correct Option: A
Explanation:

There are 12 face cards in a standard deck of 52 cards, and 3 of them are hearts. Therefore, the probability of drawing a heart, given that the card is a face card, is 3/12, which simplifies to 1/4.

What is the probability of rolling a 6 on a standard six-sided die, given that the die has already landed on a number greater than 3?

  1. 1/2

  2. 1/3

  3. 1/4

  4. 1/6


Correct Option: A
Explanation:

There are 3 numbers greater than 3 on a standard six-sided die (4, 5, and 6), and 2 of them are even (4 and 6). Therefore, the probability of rolling a 6, given that the die has already landed on a number greater than 3, is 2/3.

What is the probability of drawing a heart from a standard deck of 52 cards, given that the card is a red card?

  1. 1/2

  2. 1/3

  3. 1/4

  4. 1/6


Correct Option: A
Explanation:

There are 26 red cards in a standard deck of 52 cards, and 13 of them are hearts. Therefore, the probability of drawing a heart, given that the card is a red card, is 13/26, which simplifies to 1/2.

What is the probability of rolling a 6 on a standard six-sided die, given that the die has already landed on a number that is not a multiple of 3?

  1. 1/2

  2. 1/3

  3. 1/4

  4. 1/6


Correct Option: A
Explanation:

There are 4 numbers that are not multiples of 3 on a standard six-sided die (1, 2, 4, and 5), and 2 of them are even (2 and 4). Therefore, the probability of rolling a 6, given that the die has already landed on a number that is not a multiple of 3, is 2/4, which simplifies to 1/2.

What is the probability of drawing a heart from a standard deck of 52 cards, given that the card is a black card?

  1. 0

  2. 1/2

  3. 1/3

  4. 1/4


Correct Option: A
Explanation:

There are no hearts in a standard deck of 52 cards that are black. Therefore, the probability of drawing a heart, given that the card is a black card, is 0.

What is the probability of rolling a 6 on a standard six-sided die, given that the die has already landed on a number that is not a multiple of 2?

  1. 1/3

  2. 1/2

  3. 1/4

  4. 1/6


Correct Option: A
Explanation:

There are 5 numbers that are not multiples of 2 on a standard six-sided die (1, 3, 4, 5, and 6), and 2 of them are even (4 and 6). Therefore, the probability of rolling a 6, given that the die has already landed on a number that is not a multiple of 2, is 2/5.

What is the probability of drawing a heart from a standard deck of 52 cards, given that the card is a club?

  1. 0

  2. 1/2

  3. 1/3

  4. 1/4


Correct Option: A
Explanation:

There are no hearts in a standard deck of 52 cards that are clubs. Therefore, the probability of drawing a heart, given that the card is a club, is 0.

What is the probability of rolling a 6 on a standard six-sided die, given that the die has already landed on a number that is not a multiple of 4?

  1. 1/2

  2. 1/3

  3. 1/4

  4. 1/6


Correct Option: A
Explanation:

There are 4 numbers that are not multiples of 4 on a standard six-sided die (1, 2, 3, and 5), and 2 of them are even (2 and 4). Therefore, the probability of rolling a 6, given that the die has already landed on a number that is not a multiple of 4, is 2/4, which simplifies to 1/2.

What is the probability of drawing a heart from a standard deck of 52 cards, given that the card is a diamond?

  1. 0

  2. 1/2

  3. 1/3

  4. 1/4


Correct Option: A
Explanation:

There are no hearts in a standard deck of 52 cards that are diamonds. Therefore, the probability of drawing a heart, given that the card is a diamond, is 0.

What is the probability of rolling a 6 on a standard six-sided die, given that the die has already landed on a number that is not a multiple of 5?

  1. 1/2

  2. 1/3

  3. 1/4

  4. 1/6


Correct Option: A
Explanation:

There are 5 numbers that are not multiples of 5 on a standard six-sided die (1, 2, 3, 4, and 6), and 2 of them are even (2 and 4). Therefore, the probability of rolling a 6, given that the die has already landed on a number that is not a multiple of 5, is 2/5.

What is the probability of drawing a heart from a standard deck of 52 cards, given that the card is a spade?

  1. 0

  2. 1/2

  3. 1/3

  4. 1/4


Correct Option: A
Explanation:

There are no hearts in a standard deck of 52 cards that are spades. Therefore, the probability of drawing a heart, given that the card is a spade, is 0.

What is the probability of rolling a 6 on a standard six-sided die, given that the die has already landed on a number that is not a multiple of 6?

  1. 1/2

  2. 1/3

  3. 1/4

  4. 1/6


Correct Option: A
Explanation:

There are 5 numbers that are not multiples of 6 on a standard six-sided die (1, 2, 3, 4, and 5), and 2 of them are even (2 and 4). Therefore, the probability of rolling a 6, given that the die has already landed on a number that is not a multiple of 6, is 2/5.

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