Year 7 Numeracy: Probability

A bag contains 4 red, 6 blue and 5 green marbles. One marble is picked at random. What is the probability it is red or green?

A fair six-sided die is rolled 120 times. The number 3 appeared 28 times. How many more times than expected did the number 3 appear?

A bag contains 4 red, 6 blue and 5 green marbles. One marble is picked at random. What is the probability it is red or green?

A jar contains 15 counters: 8 red, 4 blue and 3 yellow. One counter is chosen without looking. Which of these statements is correct?

A class of 30 students voted for their favourite sport: 12 chose soccer, 9 chose basketball and 9 chose swimming. One student is chosen at random. What is the probability they chose basketball or swimming?

A fair six-sided die is rolled 120 times. The number 3 appeared 28 times. How many more times than expected did the number 3 appear?

Students in a class were asked to name their favourite outdoor activity. The results are shown in the table. | Activity | Number of students | |---------------|--------------------| | Swimming | 11 | | Cycling | 8 | | Bushwalking | 5 | | Skateboarding | 6 | What is the probability that a randomly selected student's favourite activity is cycling? Round your answer to the nearest hundredth.

A bag contains 12 red marbles, 8 blue marbles, 5 green marbles and 15 yellow marbles. One marble is picked at random. What is the probability of picking a blue marble?