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Probability - Practice
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Terms in this set (20)
1/4
what is the probability of getting two heads on two tosses of a coin?
3/8
A bag contains 1 red marble, 3 green and 4 blue. What is the probability of picking a green marble on the first draw?
0
A bag contains 1 red marble, 3 green, 4 blue. What is the probability of picking a yellow marble on the first draw?
1/2
A bag contains 1 red marble, 3 green, 4 blue. What is the probability of not picking blue marble on the first draw?
4/8
A spinner is spun once. What is the probability of landing on black segment?
1/18
A die is rolled twice. What is the probability of rolling a dice and getting a 1 and a 6?
1/6
A bag contains 5 red marbles, 6 green and 2 blue. If two marbles are drawn at random without replacement, what is the probability of picking a red and a blue marble?
5/36
A bag contains 5 red marbles, 6 green and 2 blue. If two marbles are drawn at random with replacement, what is the probability of picking a red and a blue marble?
20/33
A bag contains 5 red marbles, 6 green and 2 blue. If two marbles are drawn at random without replacement, what is the probability of picking two marbles that are different colours?
5/8
The spinner is spun once.What is the probability of landing on an even number or 3?
1/2
The spinner is spun twice. What is the probability of landing on an odd and even number?
1/4
The spinner is spun twice. What is the probability of landing on both black sections?
Experimental Probability
Probability based on an experiment written as a ratio comparing the number of times the event occurred to the number of trials.
Theoretical Probability
Probability based on reasoning, written as a ratio of the number of favorable outcomes to the number of possible outcomes.
Certain
100% chance that the desired outcome will occur.
Impossible
0% chance that the desired outcome will occur.
Equally likely
a Fifty Fifty chance of the desired outcome occurring
Tree Diagram
A diagram which organises all the possible outcomes of a given event.
probability of getting an A
75%
probability of getting a B
0.25
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