(11/2) x ((3/7) / (3/10)
(11/2) x (3/7) x (10/3)
330/42
7 6/7 or 7.857142857 ( or 7.86 rounded to nearest hundredth)
Answer:
A) 99.7% of people have an IQ between 64 and 136.
B) 5% of people have an IQ score less than 76 or greater than 124.
C) 16% of people have an IQ score greater than 112.
Step-by-step explanation:
The Empirical Rule tells us that, in a normal or 'bell-shaped' distribution, 68% of the data is one standard deviation from the mean, 95% of the data is two standard deviations from the mean, and 99.7% of the data is three standard deviations from the mean.
A) 64 and 136 are 3 standard deviations away from the mean, so 99.7% of people have an IQ between 64 and 136.
B) 76 and 124 are 2 standard devations away from the mean, but the answer is asking what percentage is not between them. 100% - 95% gives us 5%.
C) 112 is one standard deviation away from the mean. If we want to find the percentage greater, then we can do 100% - 50% (as 112 is to the left of the mean), then we can take half of 68 to get 34%, and after subtracting 50% and 34% from the 100%, we get 16%.
Answer:
Step-by-step explanation:
Solving for the variable 
, given that :
We can first start start by subtracting 
from both sides of the equation:
Now, we can divide both sides of the equation by the coefficient of , which would be 
:
Applying the fraction rule 
:
Then, apply the fraction rule 
Answer: 875.5x
Step-by-step explanation:
