Area of triangle=1/2bh
18×10=180
180÷2=90
Area of square=l×w
18×18=324
324+90=414
(18×10)÷2+(18×18)
Answer:
Step-by-step explanation:
In statistics, whenever full population cannot be surveyed, a random sample can be taken and from the observations population behaviour can be estimated.
Here given that there are 200 members. Instead of collecting data from all 200, 20 members are randomly taken.
The sample mean x bar can be estimated to give an idea the population mean also.
ACcording to central value theorem, means of different samples will follow a distribution with mean = population mean and std deviation = std dev of sample/square root of n
Hence we fix confidence interval as Mean + or - Z critical * std error
This gives us an idea about within which means will lie for different samples and hence give an idea about population mean also.
Profit percentage for weaver after selling mat is equals to 140%.
<h3>What is percentage ?</h3>
" Percentage is defined as the hundredth part of the whole given quantity. It is represented by symbol %."
Formula used
Profit% =
× 100
According to the question,
Given,
Cost price of bundle of grass = $50.00
Number of mats made = 8
Selling price of each mat = $15.00
Therefore,
Selling price of 8 mats = 15 × 8
= $120
Selling price > Cost price
Therefore,
Profit = Selling price - Cost price
= 120 - 50
= $70
Substitute the value in the formula to get profit percentage we get,
Profit% =
×100
= 140%
Hence, profit percentage for weaver after selling mat is equals to 140%.
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