Tree Diagram for conditional probability 2.mp4

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Thank you for taking time to help us. I am a new loyal follower again thank you so much I was thinking I will fail stats.

alexarvelobigal
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@Higherwings05
The .65 in the second example comes from 1 minus .35. We do this because only two events are considered possible at the first level in this tree diagram. If one doesn't occur then the other must. Thereforene or the other is occuring 100% of the time, making them complemnetary events.

ProfessorRosever
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@Higherwings05
In geometry, complementary angles have measures that add to 90 degrees. If we know one angle then we can find its complement (assuming its acute) by subtracting the known value from 90. Similarly, for probability, complementary events have probabilities that add to 100%, There fore if we know the probability of one is 35% then the probability of the other must necessarily be 100 minus 35 which is 65%

ProfessorRosever
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You are making me to like math :) thanks.

angelaerickson
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thanks my friend really appreciated it it :)

shivanparwar