Answer: The central limit theorem tells us that when random samples are chosen the results tend to approach a normal distribution.
The basic idea is that the more random samples that you select, the closer you should get to the mean. In most cases, 30 or more samples is regarded as a large enough sample to get close to the mean. Our sample is 48, so we should be close to the mean.
This is a proportion problem.
z 4
--- = ----
12 5
We can cross multiply and divide.
5z = 48
z = 9.6
Hope this helps!
Set up an equation to solve.
70% of original price equals $550, the amount Susan is paying.
0.70x = 550
Answer:
Option (B) is correct.
To prove
As given the epression in the question is given by
Now simplify the above
Terms are written as
Put in the above expression.
Answer:
The answer is A) x equals 3
