Question 
Answer 
Wrong Answers 
If you flip a fair coin, what is the probability it will come up heads? 
1/2   98.2% 

If you roll a fair sixsided die, what is the probability you get an odd number? 
1/2   82.7% 

A spinner is divided into six equal sections: three blue, two yellow, and one red. If each section is equally likely, what is the probability that a spin will land you in a yellow section? 
1/3   81.5% 

A card is drawn from a deck. What is the probability it is an ace? 
1/13   75.6% 

A gumball machine contains 100 blue, 100 yellow, and 100 red gumballs. If you purchase two gumballs, what are the odds that you have a matching pair? 
About 1/3   53% 
About 1/9   24.4% 
About 1/2   4.2% 
About 1/4   4.2% 

A gumball machine contains 100 blue, 100 yellow, and 100 red gumballs. How many gumballs do you need to purchase to guarantee that you have a matching pair of any color? 
4   50.6% 

If you flip a coin 100 times and it comes up heads every single time, what can you conclude? 
Neither of the above   50% 
It’s a twoheaded coin   12.5% 
The coin is not fair   13.7% 
Both of the above   14.3% 

A gumball machine contains 100 blue, 100 yellow, and 100 red gumballs. If you purchase two gumballs, what are the odds that you have two blue ones? 
About 1/9   48.8% 
About 1/3   23.8% 
About 1/2   5.4% 
About 1/4   3.6% 

What is the expected value of the average of 1000 rolls of a fair sixsided die? 
3.5   44% 
6   11.9% 
1000   9.5% 
The Spanish Inquisition   5.4% 

A cat has four kittens. If each kitten is equally likely to be a boy or girl, which of the following is the most likely? 
Three kittens are one gender and one is the other   25% 
All kittens are the same gender   2.4% 
Two kittens are boys and two are girls   44.6% 
Three kittens are boys and one is a girl   3% 

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