Tree Diagrams Conditional Demonstration This resource provides animated

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Tree Diagrams – Conditional – Demonstration This resource provides animated demonstrations of the mathematical

Tree Diagrams – Conditional – Demonstration This resource provides animated demonstrations of the mathematical method. Check animations and delete slides not needed for your class.

Woodley United will play two matches against Enfield Wanderers. Conditional Tree Diagrams Why would

Woodley United will play two matches against Enfield Wanderers. Conditional Tree Diagrams Why would the probability change? What is P(Win both matches)? 1 st Match 2 nd Match Win WW Win Lose Result Win WL LW Lose LL ①

② What is P(Dry on Weds & Thurs)? Wednesday Thursday Rain RR Rain Dry

② What is P(Dry on Weds & Thurs)? Wednesday Thursday Rain RR Rain Dry Result Rain RD DR Dry DD

③ The probability Jack passes his 1 st Geography test is 0. 7 If

③ The probability Jack passes his 1 st Geography test is 0. 7 If he passes the 1 st test, the probability he passes the 2 nd test is 0. 8 If he fails the 1 st test, the probability he passes the 2 nd test is 0. 6 What is the probability he passes only one of the tests? 1 st Test 2 nd Test Result Pass PP Fail PF Pass FP Fail FF Pass Fail

There are black and white marbles in the box. Box & Marbles One is

There are black and white marbles in the box. Box & Marbles One is picked – and not replaced – then another is picked. What is the probability one or more black marbles are picked? What is the probability two marbles of the same colour are picked? 1 st Pick 2 nd Pick Black BB Black White Result Black BW WB White WW ④

Questions? Comments? Suggestions? …or have you found a mistake!? Any feedback would be appreciated

Questions? Comments? Suggestions? …or have you found a mistake!? Any feedback would be appreciated . Please feel free to email: tom@goteachmaths. co. uk