Suppose the grades for the course STOR 155 in 2017 followed the following probability distribution Grade Probability A = 4 B= 3 C =2 D=1 F=0 0.2 0.31 0.23 0.18 0.08 (a) What is the chance that a randomly chosen student from the course received a B or better? Answer to two decimal places. (b) Suppose you chose two students at random from the course. What is the chance that they both received a B or better? Answer to four decimal places. (c) Joseph and Emily took STOR 155 in 2017. They prepared for the exams together. Let A = {Joseph receives a C} and B = {Emily receives a C) be two events. Then, O A and B are disjoint and independent events. O A and B are independent but not disjoint events. O A and B are dependent but not disjoint events. O A and B are disjoint and dependent events.
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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