Answer:
9/19
Step-by-step explanation:
if 20 students are boys, then the remaining students are girls. 38-20 = 18
There are 18 girl students.
18/38 can be simplified to 9/19
Answer:
$1,920
Step-by-step explanation:
you multiply 12 by 40. then, assuming a typical month is 4 weeks, you multiply that number by 4.
First we find list the data in order
Then we find the median
We split the data in half and find the median of the first half which is C
For this, I will be factoring by grouping to solve for y.
Firstly, factor y^3 + 5y^2 and -9y - 45 separately, Make sure that they have the same quantity on the inside:
Now you can rewrite it as . However we are not finished factoring.
Now with y^2 - 9, we will apply the difference of squares rule, which is . Apply it as such:
Now that it is completely factored, we can apply the Zero Product Property and solve for y:
<u>In short, y = -5, -3, and 3.</u>
Answer:
We know that n = 50 and p =0.78.
We need to check the conditions in order to use the normal approximation.
Since both conditions are satisfied we can use the normal approximation and the distribution for the proportion is given by:
With the following parameters:
Step-by-step explanation:
Previous concepts
The binomial distribution is a "DISCRETE probability distribution that summarizes the probability that a value will take one of two independent values under a given set of parameters. The assumptions for the binomial distribution are that there is only one outcome for each trial, each trial has the same probability of success, and each trial is mutually exclusive, or independent of each other".
Solution to the problem
We know that n = 50 and p =0.78.
We need to check the conditions in order to use the normal approximation.
Since both conditions are satisfied we can use the normal approximation and the distribution for the proportion is given by:
With the following parameters: