Three friends (a, b, and c. will participate in a round-robin tournament in which each one plays both of the others. suppose that p(a beats b.= 0.7, p(a beats c.= 0.9, p(b beats c.= 0.3, and that the outcomes of the three matches are independent of one another. (a) what is the probability that a wins both her matches and that b beats c? .189 correct: your answer is correct. (b) what is the probability that a wins both her matches? .63 correct: your answer is correct. (c) what is the probability that a loses both her matches? .03 correct: your answer is correct. (d) what is the probability that each person wins one match? (hint: there are two different ways for this to happen.) .588 incorrect: your answer is incorrect.

since proposition states that a number is greater than 25, if is true then the number must actually be greater than 25.

this implies that all possible options, except 24, can be accepted

introduction, methodology, results, discussion

step-by-step explanation:

an observational study is one which consists of actual observation to record data and then analyse the data.

there are a number of factors that should be analyzed before starting an observational study.

the main four factors are:

i) introduction:   this should be analysed to check whether the purpose of the study is correctly established and the data recorded are appropriate for the study

methodology:   the method of collecting the data, such as whether randomly selected, and whether sample size matches with the population to be studied, whether questions asked are easy to answer by common men, etc.

results: then results such as summary of data with comments should be studied thoroughly

discussion:   the last is the discussion, this can be either by management people or persons who are all interested , etc.