A marketing firm would like to test-market the name of a new energy drink targeted at 18- to 29-year-olds via social media. Suppose a study found that 39% of adults (18 and older) do not use social media. Suppose the percentage of adults age 30 and older is 77%. Suppose that the percentage of the adult population that is either age 18–29 or uses social media is 66.6%. (a) What is the probability that a randomly selected adult uses social media? (b) What is the probability that a randomly selected adult is aged 18–29? (c) What is the probability that a randomly selected adult is 18–29 and a user of social media?
Compound Probability
Compound probability can be defined as the probability of the two events which are independent. It can be defined as the multiplication of the probability of two events that are not dependent.
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Probability theory is a branch of mathematics that deals with the subject of probability. Although there are many different concepts of probability, probability theory expresses the definition mathematically through a series of axioms. Usually, these axioms express probability in terms of a probability space, which assigns a measure with values ranging from 0 to 1 to a set of outcomes known as the sample space. An event is a subset of these outcomes that is described.
Conditional Probability
By definition, the term probability is expressed as a part of mathematics where the chance of an event that may either occur or not is evaluated and expressed in numerical terms. The range of the value within which probability can be expressed is between 0 and 1. The higher the chance of an event occurring, the closer is its value to be 1. If the probability of an event is 1, it means that the event will happen under all considered circumstances. Similarly, if the probability is exactly 0, then no matter the situation, the event will never occur.
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