Math Puzzles answered

 People often wonder about the "Math" questions toward the end of the survey. These are designed to assess statistical numeracy, which was found to influence how people think about risk. In case you are curious, here are the correct answers:

 

Q1: Imagine we are throwing a five-sided die 50 times. On average, out of these 50 throws how many times would this five-sided die show an odd number (1, 3 or 5)?

Answer: 30 out of 50

 

Q2: Out of 1,000 people in a small town 500 are members of a choir. Out of these 500 members in the choir 100 are men. Out of the 500 inhabitants that are not in the choir 300 are men. What is the probability that a randomly drawn man is a member of the choir? 

Answer: 25%

 

Q3: Imagine we are throwing a loaded die (6 sides). The probability that the die shows a 6 is twice as high as the probability of each of the other numbers. On average, out of these 70 throws, about how many times would the die show the number 6?

Answer: 20 out of 70 throws

 

Q4: In a forest 20% of mushrooms are red, 50% brown and 30% white. A red mushroom is poisonous with a probability of 20%. A mushroom that is not red is poisonous with a probability of 5%. What is the probability that a poisonous mushroom in the forest is red? 

Answer: 50%