Solve Statistics Problems Essay Toefl Writing Section
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.
You use the rule P(A or B) = P(A) P(B) if the events are mutually exclusive.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.Most probability questions are word problems, which require you to set up the problem and break down the information given to solve.The process to solve the problem is rarely straightforward and takes practice to perfect.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).You use the rule P(A and B) = P(A) x P(B|A) when the events are dependent.P(B|A) is a conditional probability, indicating the probability that event A occurs given that event B has already occurred.