550 people use a public swimming pool the prices are 1.75$ for children and 2.25$ for adults the receipts for admission totaled is 1153.00$ How many children were at the pool

There were 169 children at the pool.

Step-by-step explanation:

Given:

Total number of people = 550

Price per child = $1.75

Price per adult = $2.25

Total cost of the admission receipts = $1153.00

Let the number of children be 'x' and number of adults be 'y'.

As per question:

Total number of people is equal to total children and total adults. So,

Total cost of admission is equal to the sum of cost of total children and total adults. So,

Multiplying equation (1) by 1.75 and subtracting the result equation from equation (2). This gives,  

So, there were 381 adults at the pool. Now, the number of children is equal to:

Therefore, there were 169 children at the pool.

she will most likely have 33  

step-by-step explanation:

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.