Using a tree diagram find the probability that the second marble is red given that the first one is red. Originally used for a gcse higher tier set.
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Draw a probability tree diagram.
Conditional probability tree diagram worksheet. The trees are provided between the questions and the answers 5. A bag contains 2 black balls and 8 white balls. Conditional probability and tree diagrams de nition if a and b are events in a sample space s with p b 6 0 the conditional probability that an event a will occur given that the event b has occurred is given by p a b p a b p b.
Try to answer all the questions marked a b etc. I at least one blue. For conditional probability questions when drawing the tree diagram we have to be careful as the probability changes between the two events.
Free worksheet created by mathsprint. Give your answer to the nearest two decimal places. Worksheet containing the examples.
A show all the possible outcomes using a probability tree diagram. Useful as a revision activity at the end of a topic on probability tree diagrams or for gcse maths revision by mapping out conditional probabilities pupils will get a significant insight into probability trees and. 2 a counter is chosen at random and not replaced before choosing another one.
A worksheet with a range of problem solving activities to give students practice of using probability tree diagrams with both independent probability and conditional probability. Conditional probability tree diagram example. Some of the worksheets for this concept are tree diagrams and the fundamental counting principle mathematics linear 1ma0 probability tree diagrams tree diagrams 70b conditional probability and tree diagrams section conditional probability and tree diagrams wjec mathematics awork aboutprobabilitytreediagrams lesson plan 2.
B calculate the probability of getting. A a probability tree diagram to show all the possible outcomes. This is the result of not replacing the first ball hence only leaving 13 balls in the bag to pick from.
B the probability of getting. Check all those answers in the back of the worksheet. 1 a bag contains 10 counters with the letters of the word statistics written on them.
Tree diagrams and conditional probability. If the outcomes of s are equally likely then p a b. Ii one red and one blue.
This is the currently selected item. Double check that the leaf probabilities add to one. Displaying top 8 worksheets found for probability tree diagrams.
Tree diagrams conditional events www mathsprint co uk 1. Tree diagrams conditional events 1 mathsprint 2013 name. Iii two of the same color.
I at least one blue. Check your tree against mine. Adding together the probabilities of the result being two different colours.
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