How to find probabilities of 2 events using a tree diagram 10 October, 2004 Probability Tree Diagrams How to find probabilities of 2 events using a tree diagram

A coin and a single dice are thrown at the same time A coin and a single dice are thrown at the same time. What is the probability of getting a 4 on the dice and head on the coin? First: workout the two separate probabilities .The Dice P(4) = 1/6 P(not 4) =5/6 The Coin P(Head) = 1/2 P(not head) = 1/2

A coin and a single dice are thrown at the same time A coin and a single dice are thrown at the same time. What is the probability of getting a 4 on the dice and head on the coin? Second: Draw a diagram like this putting on the results Head 1/2 .The Dice P(4) = 1/6 P(not 4) =5/6 The Coin P(Head) = 1/2 P(not head) = 1/2 4 1/6 1/2 Not Head Head 1/2 5/6 Not 4 1/2 Not Head

A coin and a single dice are thrown at the same time A coin and a single dice are thrown at the same time. What is the probability of getting a 4 on the dice and head on the coin? Second: Draw a diagram like this putting on the results Head 0.5 .The Dice P(4) = 1/6 = 0.17 P(not 4) =5/6 = 0.83 The Coin P(Head) = ½ = 0.5 P(not head) = ½ = 0.5 4 0,17 0.5 Not Head Head 0.5 0.83 Not 4 0.5 Not Head