AP Statistics Unit 4 Summary Review Video Part 1 - Intro to Probability

This video is Part 1 of a series of 3 videos that completely summarizes everything Unit 4 of AP statistics! This videos covers the basic probability rules and how to use them!
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[@mporinchak]

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[@barnabyinteractive]

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[@kalebmcgarry3595]

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[@mporinchak]

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[@TheidiotAmongUs]

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[@jeffreywong1260]

Hi! Why would we not subtract 0.1092 after adding 0.3108 and 0.1508? Isn't the probability that (A and B) = P(A) +P(B) - P(A n B) and P(A n B) equals 0.1092?

[@mporinchak]

because the question asked for the probability of purchasing EXACTLY one car. Which is very specific. Car 1 and NOT car 2 OR Car 2 and NOT car 1. It is not asking for probability of car 1 OR car 2. Does that make sense?

[@ChatGPTGamingReal]

i like thinking about it in the venn diagram. since we only want 1 car we are finding the probability of just A and just B, NO OVERLAPS! so instead of just subtracting one overlap we would subtract both overlaps. as you said the overlap is 0.1092, and two of those overlaps is 0.2184. 0.42 + 0.26 - 0.2184 = 0.4616! hope that helps