In a container of 60 coins, there are twice as many quarters as nickels and three times as many dimes as nickels. (a) Determine the number of each kind of coin in the container.
There are
quarters,
dimes, and
nickels in the container.
(b) If one coin is shaken from the container, the probability that the coin is a quarter is
The probability that the coin is not a nickel is
(c) If three coins are shaken from the container, the probability that their total value is more than $0.75 is __

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.

answer is x<

no solution

step-by-step explanation:

there is not enough information in the problem to solve.

ratio is 2 : 9

the answer is three

13.5 : 3