Question 3 of 5 Points: 10 Again we have two methods, A and B, available for tea

Question

Question 3 of 5 Points: 10

Again we have two methods, A and B, available for teaching a certain industrial skill. There is a 95% chance of successfully learning the skill if method A is used, and an 80% chance of success if method B is used. However, method A is substantially more expensive and is therefore used only 25% of the time (method B is used the other 75% of the time).

Which of the following is the correct probability tree for this problem?

Explanation / Answer

Option D is correct

At first level we have two options for selecting the learning method, either A or B. A has 0.25 probability of selection and B has 0.75 probability of selection.

At next level we see the success rate of each method. A is successful at 95% of times in learning a particular skill however B is only 80% successful.

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