Probability Intro (Cambridge Basics)

A bag contains 5 red marbles, 3 blue marbles, and 2 green marbles. What is the probability of drawing a blue or green marble?

• 0.3
• 0.5
• 0.8
• 0.6

What language is commonly used in probability to indicate 'and'?

• For example, 'rolling an even number and a prime number' means rolling a 2
• For example, 'at least 3' means 3, 4, 5, ...
• For example, 'at most 7' means ..., 5, 6, 7
• For example, 'rolling an even number or a 5' means rolling a 2, 4, 5, 6

What is the complement of 'rolling the number 3'?

• Rolling a 3
• Rolling a number other than 3
• Rolling a 2
• Rolling a 4

What language is commonly used in probability to indicate 'or'?

• For example, 'rolling an even number or a 5' means rolling a 2, 4, 5, 6
• For example, 'rolling an even number and a prime number' means rolling a 2
• For example, 'at most 7' means ..., 5, 6, 7
• For example, 'at least 3' means 3, 4, 5, ...

What is the complement of 'rolling a prime number'?

• Rolling an odd number
• Rolling a composite number
• Rolling a number other than a prime number
• Rolling a prime number

What is the sample space for the roll of a fair six-sided die?

• Heads, Tails
• Red, Blue, Green
• A, B, C
• 1, 2, 3, 4, 5, 6

What is the concept of probability as a number between 0 and 1?

• A number that represents the chance that an event occurs
• A number that can be greater than 1
• A number that can be any value
• A number that can be negative

What is the complement of 'rolling an even number'?

• Rolling an odd number
• Rolling a prime number
• Rolling an even number
• Rolling a number other than 2

If you flip a fair coin twice, what is the probability of getting at least one head?

• 0.25
• 0.5
• 0.75
• 1

What does the probability of an event represent?

• The complement of the event
• The sample space
• A number between 0 and 1 that represents the chance that the event occurs
• The event itself