Year 7: Sample Space + Calculate Probability

The extent to which something is likely to occur is known as - 

• sample space
• an event
• probability
• data

A set of all possible outcomes is known as - 

• a list
• a complement
• a sample space
• an event

How do we determine which event is most likely to occur?

• The event has the closest improper fraction to 1
• The event has the closest proper fraction to 1/2
• The event has the closest proper fraction to 0
• The event has the closest proper fraction to 1

What is the probability of spinning an even number? 

• 16 2/3%
• 33 1/3%
• 50%
• 75%

What is the probability of spinning a number less than 5?

• 1/3

• 4/2

• 2/3

• 5/6

What is the probability of spinning a yellow, green, or blue?

• 3/4

• 1/12

• 1/3

• 1/16

What is the probability of rolling a sum of 1 with a pair of dice?

• 0

• 1/6

• 1/12

• 1/36

A bag has 3 red marbles, 2 blue and 4 yellow. What is the probability of pulling a red?

• 3/10

• 4/9

• 1/9

• 1/3

A bag contains 5 green balls, 4 red balls and 3 blue balls. A ball is chosen at random from the bag. Find the probability of choosing either a green ball or blue ball.

• $\frac{1}{4}$

• $\frac{5}{12}$

• $\frac{2}{3}$

• $\frac{7}{12}$

A basket contains 6 number cards numbered as 17, 21, 25, 29, 31 and 39. A card is selected at random. What is the probability that a card with a prime number is chosen?

• $\frac{2}{3}$

• $\frac{1}{2}$

• $\frac{1}{3}$

• $\frac{1}{6}$