Answer:
y=125a+1
Step-by-step explanation:
Answer:The formula for a can be calculated by the following steps;
Step-by-step explanation:
-3a-a=4b-6b
-4a=-2b
cancelling the negative sign;
4a=2b
a=2b/4
a=b/2
Using the binomial distribution, it is found that there is a:
a) 0.9298 = 92.98% probability that at least 8 of them passed.
b) 0.0001 = 0.01% probability that fewer than 5 passed.
For each student, there are only two possible outcomes, either they passed, or they did not pass. The probability of a student passing is independent of any other student, hence, the binomial distribution is used to solve this question.
<h3>What is the binomial probability distribution formula?</h3>
The formula is:


The parameters are:
- x is the number of successes.
- n is the number of trials.
- p is the probability of a success on a single trial.
In this problem:
- 90% of the students passed, hence
.
- The professor randomly selected 10 exams, hence
.
Item a:
The probability is:

In which:




Then:

0.9298 = 92.98% probability that at least 8 of them passed.
Item b:
The probability is:

Using the binomial formula, as in item a, to find each probability, then adding them, it is found that:

Hence:
0.0001 = 0.01% probability that fewer than 5 passed.
You can learn more about the the binomial distribution at brainly.com/question/24863377
Ok, so first you solve whatever is in the parentheses.
(28 • 5-5 • 190)-2•228
28• 5 = 140
Then 5 •190 = 950
Then multiply 950 • 140 = 133,000
Then it should look like this:
133,000-2•228
Multiply 2 • 228 = 456
Then subtract 456 from 133,000.
The answer should come out to 132,544.
yes and no answer+the math:
1) yes
2) yes
1) so if you take 255-75 you get 180 now keep that in mind for number 2, when you divide 180 by 6 you will get 30 so we can give 30 cards to everyone
2) remember the 180? were using it again. if you do 180 and divide that by 4 you get 45 so we can give 45 cards to everyone.
hope this helps!