## 13.4.2 Simple Probability, PT3 Focus Practice

Question 5: A box contains 36 green erasers and a number of red erasers. If an eraser is picked randomly from the box, the probability of picking a red eraser is 5 8 . Find the number of red erasers. Solution: Probability of picking a green eraser = 1 – 5 8 = 3 8 … Read more