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A Matter of Probability...

Created by queenofsheba

Fun Trivia : Quizzes : Statistics and Probability

	"Nothing is certain in this quiz. Test your calculation of probability. The questions are tricky, but can all be solved by logical thinking and a little bit of mathematics. E.g. a probability of 1/4 means one chance out of four, or 25%."
15 Points Per Correct Answer - No time limit

1. You pick two cards out of a standard pack of 52. The first card is a king. What's the probability of the second card also being a king?

1/17

3/13

1/13

1/14

2. You toss a coin four times. The first, second and third toss are heads. What's the probability of the fourth toss also being heads?

1/16

1/4

1/2

1/8

3. I choose two different numbers between 1 and 10 (1 and 10 are included). You try to guess the two numbers. How much chance do you have to guess both numbers correctly in one attempt?

1/25

1/90

1/45

1/100

4. We're playing poker with a standard pack of fifty-two cards without jokers. You have two pairs: 3, 3, 4, 4, 8. You are unaware of which cards the other players are holding. You decide to replace the 8 by another card from the pack. How do you rate your chances to turn your hand into a full house? (Full house means one trio and one pair.)

1/26

1/13

4/47

2/13

5. Ashley throws two normal, six-faced dice. How much chance does she have for a total of at least 11?

2/11

1/12

1/18

1/6

6. Eight cardboard boxes are standing on the table. Two among them contain a present, the other six are empty. You are allowed to open two boxes. How much chance do you have to find at least one present?

7/16

9/16

15/28

13/28

7. Peter, Mark, Anne and Rose are four good friends. They belong to a group of sixty pupils who are to be divided at random into three classes of twenty. What's the probability of all four friends sharing the same class?

1/81

19x18x17/59x58x57

1/64

1/12

8. I have thirty socks in total disorder in my closet. Ten are black, ten are red and ten are brown, but I can't distinguish the colours in the dark. How many socks do I have to take to have at least one pair of the same colour?

11

12

3

4

9. There are seven cups of tea. Two among them contain a deadly poison that acts within an hour. You and I both drink one cup simultaneously. How big is the chance that we both survive?

11/21

10/21

25/49

24/49

10. If someone answers these ten multiple choice questions totally at random, what is the chance that he has all answers wrong?

1/1,048,576

59,049/1,048,576

1/1,024

243/1,024