Answer:
3 Blue Umbrellas
Step-by-step explanation:
Given
From the question, we have:
---- i.e. 6 are not blue
---- i.e. 6 are not yellow
---- i.e. 6 are not red
Required
The number of blue umbrellas
Make B the subject in:
Substitute: in
Collect like terms
Rewrite:
Substitute in
Divide both sides by 2
Recall that:
We actually don't need to do any computation. By definition, the inverse function changes the role of input and output. So, if a function f maps x onto y, the inverse function maps y onto x.
You have to think like this: if the function makes a step further, the inverse function makes that same step back.
This means that the composition is always the identity function
. In fact,
So, for every function, you have
Answer:
Step-by-step explanation:
As sample size increase the variability of the estimate of the proportion would decreases ( reduces)
The formula of variance of the estimator of the proportion is as
Since the denominator of the formula of the variance of sample proportion is n
so as n increase the variance of it decrease.
The center of the estimate of proportion would same
Because
which does not affect the value of n ( sample size).