A
B
C
D
E
100
A bag has 2 yellow marbles, 4 blue marbles, and 4 red marbles. A marble is chosen from the bag at random. What is the probability that it is yellow? P(Yellow)
2/10 = 0.2
100
A spinner with equally sized slices has 2 blue slices, 4 red slices, and 4 yellow slices. The dial is spun and stops on a slice at random. What is the probability that the dial stops on a blue slice? P(Blue)
2/10 = 0.2
100
A 20-sided die is rolled. What is the probability of rolling a prime number? P(Prime)
8/20 = 0.4
100
What proportion of the animals are cats?
30/50 = 0.6
100
What were the chances that a random person walking in was wearing a T-shirt?
30/50 = 0.6
200
Two bags of marbles. One bag has 2 blue marbles, 1 red marble, and 3 yellow marbles. The other has 2 yellow marbles, 4 red marbles, and 4 blue marbles. What is the probability of choosing a red marble from each bag? P(Red and Red)
2/30 = 0.067
200
Two spinners are side-by-side. One has 2 red and 2 blue slices, the other has 3 red and 2 blue slices. What is the probability of spinning blue on both spinners? P(Blue and Blue)
4/20 = 0.2
200
If you flip a coin and roll a 6-sided die, what is the probability that you will flip a tails and roll a 4? P(Tails and 4)
1/12 or 0.083
200
If we know the animal isn't vaccinated yet, what are the chances they are a dog?
6/25 = 0.24
200
If our kura of 730 students followed this pattern as well, how many of the students would we expect to be wearing a T-shirt?
12/23 = 0.522
300
A bag has 3 yellow marbles, 3 red marbles, and 4 blue marbles. What is the probability of choosing 3 red marbles in a row (without replacement)?
6/720 - 0.0083
300
A spinner is spun 3 times in a row. The first spin lands on a red slice, the second on a blue slice, and the third on red again. Are the events dependent or independent?
Independent
300
A die is rolled 3 times, then a coin is flipped 5 times. The die lands on 4 every time, and the coin lands on heads every time. Are the events independent or dependent?
Independent
300
What is the probability that a randomly selected animal was a dog or vaccinated?
31/50 = 0.62
300
Countdown wants to keep watch of any one who is either a student or in a sweatshirt. What are the chances that a person coming in needs to be watched?
32/50 = 0.64