<h3>
Answer: 6/7</h3>
This approximates to roughly 6/7 = 0.8571
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Explanation:
Let's define the following
- A = number of people who passed the test, and did the hw
- B = number of people who passed the test, but didn't do the hw
- C = number of people who failed the test, but did the hw
- D = number of people who failed the test, and didn't do the hw
There are 30 students in the class total. This must mean A+B+C+D = 30.
We know that "There were 7 students who failed the test and also did not complete the assignment", meaning we can say D = 7.
We can also say A+B = 21 because this is the entire group of people who passed the test (whether they did the hw or not).
This means:
A+B+C+D = 30
(A+B)+C+D = 30
(21) + C + 7 = 30
C+28 = 30
C = 30-28
C = 2
We have 2 people who failed the test, but did the hw.
Because 20 students did the hw, we know that
A+C = 20
A+2 = 20
A = 20-2
A = 18
We have 18 students who passed the test and did the hw. This is out of 21 students who passed. From here on out, we only focus on this group of students because of the phrasing "given that they passed the test". This means we know 100% that whoever we picked, they passed the test.
The probability we're after is therefore:
18/21 = (3*6)/(3*7) = 6/7
Side note: It might help to sort the data into a table as shown below. Start with table 1, and the goal is to replace the placeholder letters with the proper numbers, to arrive at table 2. You'll have to use algebra as shown earlier to fill out the table.
Answer:
Your answer would be 2
Step-by-step explanation:
You can do it 2 ways
1. Factor the numerator and denominator and cancel the common factors.
2. Reduce the expression, if possible, by cancelling the common factors.
Hope this helps. Please mark brainlist
The simplified solution is 1/21 i believe
Answer: You can use the formula (SEE EXPLANATION)
Step-by-step explanation:
Since the points are not written correctly, I will give you a general explanation about the procedure you should follow in order to find the distance between the two points.
By definition, the distance between two points can be calculated with the following formula:
As you can observe, if you have two points:
The steps you must follow in order to solve the exercise, are the shown below:
Step 1. You can substitute the values of and into the formula .
Step 2. You must evaluate in order to find the distance between those two points.