![]() Step 3: Identify which event happened first (i.e.In our example, it’s a survey, so we need the total number of respondents (100, from the table). Step 2: Divide your answer in step 1 by the total figure.From the table, the number of males is 25. In our sample, question, we were asked for the probability of no + male. Step 1: Find the number for both the events in the question happening together.Sample question: Find the probability that the answer was no, given that the respondent was male. Probability of an Event, Given Another Event: Steps If you are unsure whether or not you have a dependent event, see: Dependent or independent? This how-to will guide you through the short set of steps to finding the probability for dependent events. If I fly, what are my chances of a flight delay?.If I drive, what are my chances of having an accident?.If you’re faced with a question about the probability of an event, given another event, what these problems are really asking you is “given a certain situation, what is the probability that something else will happen?” For example: Probability of an Event, Given Another Event: Overview Our individual probabilities (as decimals) are. In order words, you want to find how many cat owners have one or two cats.Ĥ6 percent have one cat and 31 percent have two cats. The question asks about the probability of a cat owner having fewer than three cats. Step 1: Identify the individual probabilities and change the percents to decimals.If a cat owner is selected at random, what is the probability that the family will have fewer than three cats? 23 percent-Percentage of owners with three or more cats.31 percent-Percentage of owners with two cats.46 percent-Percentage of owners with one cat.Sample problem #2: According to a 2013-2014 survey for the Humane Society, people owned 95.6 million cats. Step 2: Add the probabilities together.In other words, you are looking for how many families have three or four children.įour percent of families have three children, and 2% have four or more children. The question asks about the probability of a family having three or more children.
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