# Help with probability and statistics problems

This also means that a probability value can never be negative.

Understanding the basic rules and formulas of probability will help you score high in the entrance exams. Every event will have a set of possible outcomes. A group of 8 students is chosen at random. Example 1: What is the probability of getting a 2 or a 5 when a die is rolled?

The answers to these problems are at the bottom of the page. An event that occurs for sure is called a Certain event and its probability is 1.

## Help with probability and statistics problems

The grades of a group of students in an exam are normally distributed with a mean of 70 and a standard deviation of Or there are possibilities to different degrees the event may occur. So is the probability of tail. A group of 8 students is chosen at random. Examples of events can be : Tossing a coin with the head up Drawing a red pen from a pack of different coloured pens Drawing a card from a deck of 52 cards etc. P A or B is the probability of the occurrence of atleast one of the events. Example 2: Consider the example of finding the probability of selecting a black card or a 6 from a deck of 52 cards. What is the probability of rolling a 5 when a die is rolled? Problems In a group of 40 people, 10 are healthy and every person the of the remaining 30 has either high blood pressure, a high level of cholesterol or both. When a coin is tossed, the possible outcomes are Head and Tail. Statistics and Probability Problems with Solutions sample 3 More Problems on probability and statistics are presented. Find the probability that a exactly 5 have access to the internet. This means that all other possibilities of an event occurrence lie between 0 and 1. In mathematics too, probability indicates the same — the likelihood of the occurrence of an event.

Statistics and Probability Problems with Solutions sample 3 More Problems on probability and statistics are presented. Problems In a group of 40 people, 10 are healthy and every person the of the remaining 30 has either high blood pressure, a high level of cholesterol or both.

The chart below shows the distribution, in millions of tons, for the different types of trashes. Compound probability Compound probability is when the problem statement asks for the likelihood of the occurrence of more than one outcome.

Examples of events can be : Tossing a coin with the head up Drawing a red pen from a pack of different coloured pens Drawing a card from a deck of 52 cards etc.

### Probability questions and answers examples

The chart below shows the distribution, in millions of tons, for the different types of trashes. P A and B is the probability of the occurrence of both A and B at the same time. Find the probability that the committee has a 3 women and 2 men. What is the probability of rolling a 5 when a die is rolled? A group of 8 students is chosen at random. Understanding the basic rules and formulas of probability will help you score high in the entrance exams. Example 1: What is the probability of getting a 2 or a 5 when a die is rolled? Example 2: Consider the example of finding the probability of selecting a black card or a 6 from a deck of 52 cards. An event that occurs for sure is called a Certain event and its probability is 1. A student from this group is selected randomly. If 15 have high blood pressure and 25 have high level of cholesterol, a how many people have high blood pressure and a high level of cholesterol? Consider the example of tossing a coin. Every event will have a set of possible outcomes.

A student from this group is selected randomly. Or there are possibilities to different degrees the event may occur.

Mutually exclusive events: Mutually exclusive events are those where the occurrence of one indicates the non-occurrence of the other OR When two events cannot occur at the same time, they are considered mutually exclusive.

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