Practise Questions WALT read & draw a probability tree Look at the probability tree to the left. It shows the chance of picking a red or green ball out of a bag. There is an equal chance of picking out a red and a green each time. 1. What is the chance of picking out at least one red ball? 2. What is the chance of picking out no red balls? Scroll down for answers when you have finished! :-) 3.Imagine you have a dice. You are going to roll it 2 times. Draw a probability tree for this. Hint - it will have six branches at the beginning and you will need a rather large space in your book to draw it 4. Using this probability tree find out what the chance is of rolling a total of 10 or more on your two dice. Scroll down for answers when you have finished! :-) Answers 1. 2/4 or 1/2 or 0.5 2. 1/4 or 0.25 3 & 4 are below |