Quiz Answer Key and Fun Facts
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?
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?
3. I choose two different numbers between 1 and 10 (1 and 10 are included). You try to guess the two numbers, in any order. How much chance do you have to guess both numbers correctly in one attempt?
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.)
5. Ashley throws two normal, six-faced dice. How much chance does she have for a total of at least 11?
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. 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?
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 be sure of having at least one pair of the same colour?
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?
10. If someone answers these ten multiple choice questions, all with four options, totally at random, what is the chance that he has all answers wrong?
Source: Author
queenofsheba
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crisw before going online.
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