A) Determine if the events are mutually exclusive. Select a registered voter: The voter is a Republican and the voter is a Democrat. Mutually exclusive Not mutually exclusive
Addition Rule of Probability
It simply refers to the likelihood of an event taking place whenever the occurrence of an event is uncertain. The probability of a single event can be calculated by dividing the number of successful trials of that event by the total number of trials.
Expected Value
When a large number of trials are performed for any random variable ‘X’, the predicted result is most likely the mean of all the outcomes for the random variable and it is known as expected value also known as expectation. The expected value, also known as the expectation, is denoted by: E(X).
Probability Distributions
Understanding probability is necessary to know the probability distributions. In statistics, probability is how the uncertainty of an event is measured. This event can be anything. The most common examples include tossing a coin, rolling a die, or choosing a card. Each of these events has multiple possibilities. Every such possibility is measured with the help of probability. To be more precise, the probability is used for calculating the occurrence of events that may or may not happen. Probability does not give sure results. Unless the probability of any event is 1, the different outcomes may or may not happen in real life, regardless of how less or how more their probability is.
Basic Probability
The simple definition of probability it is a chance of the occurrence of an event. It is defined in numerical form and the probability value is between 0 to 1. The probability value 0 indicates that there is no chance of that event occurring and the probability value 1 indicates that the event will occur. Sum of the probability value must be 1. The probability value is never a negative number. If it happens, then recheck the calculation.
Select a registered voter: The voter is a Republican and the voter is a Democrat.
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B) Riding to School The probability that John will drive to school is 0.43, the probability that he will ride with friends is 0.05, and the probability that his parents will take him is 0.52. He is not allowed to have passengers in the car when he is driving. What is the probability that John will have company on the way to school?
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P (John will have company on the way to school)
=?
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C) A media rental store rented the following number of movie titles in each of these categories: 166 horrors, 236 drama, 124 mystery, 306 romance, and 134 comedy. If a person selects a movie to rent, find the probability that it is a drama or romance.
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| Male | Female | |
|---|---|---|
| Age
19
|
4746
|
4517
|
| Age
20
|
1625
|
1553
|
| Age
21
|
1679
|
1627
|
Choose one driver at random. Find the following probability of selecting the driver. Round your answers to three decimal places.
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P (male and 19 and under) =?
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