# Solve Statistics Problems

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Probabilities are used in mathematics and statistics and are found in everyday life, from weather forecasts to sporting events.

With a little practice and a few tips, the process of calculating probabilities can be more manageable. One important tip when solving a probability word problem is to find the keyword, which helps to identify which rule of probability to use.

P(~A) is the probability that event A does not occur. Each equation of probability has different parts that need to be filled to solve the problem.

For the example, you determined the keyword is "and," and the rule to use is a rule of multiplication.

For problems with the keyword "or," the rule of probability to use is an addition rule. An event is the occurrence in the problem that you are solving the probability for.

For problems with the keyword "not," the rule of probability to use is the complement rule. The example problem is asking for the event that Jane will choose both the chocolate and the vanilla.A statistics problem typically contains four components: Asking a question gets the process started.It's important to ask a question carefully, with an understanding of the data you will use to find your answer.You use the rule P(A or B) = P(A) P(B) - P(A and B) when the events are not mutually exclusive.For the complement rule, you always use the rule P(A) = 1 - P(~A).If you're seeing this message, it means we're having trouble loading external resources on our website.If you're behind a web filter, please make sure that the domains *.and *.are unblocked.Breaking down the percentages into decimals will yield 0.60 x 0.70, found by dividing both percentages by 100. Converting the answer back to a percentage by multiplying by 100 will yield 42 percent. Contributing to e How, she is also a software engineer and adjunct instructor of statistics and computer information systems.Friesen holds a Master of Science in engineering management and a certificate in financial engineering, as well as Bachelor of Science degrees in applied mathematics and computer science from the Missouri University of Science and Technology.So in essence, you want the probability of her choosing these two flavors.Determine whether the events are mutually exclusive or independent if appropriate.

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