The probability that at most 8 of them take the bus to school is 0.925, written in percentage form this is 92.5%
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How to find the probability?</h3>
We know that roughly 75% of the students take the bus, then, if we select a student at random.
- There is a probability of 0.75 that the student takes the bus.
- There is a probability of 0.25 that the student does not take the bus.
The probability that at most 8 out of 9 students take the bus, is equal to one minus the probability of the 9 taking the bus, which is:
p = (0.75)^9 = 0.075
Then we have:
P = 1 - 0.075 = 0.925
The probability that at most 8 of them take the bus to school is 0.925, written in percentage form this is 92.5%
If you want to learn more about probability, you can read:
brainly.com/question/251701
So from the blue triangle to the green triangle, we can see that the green triangle is smaller, therefore eliminating options A and B.
Now to find the scale factor, use one of the sides of both triangles. In this case, I'll be using the bases of both. The blue triangle's base is 10, while the green is 5.
Using this info, we can make the fraction , which can be further simplified to . This is the scale factor.
In short, the answer is the last option.
What is the difference between selecting a member at random from a finite population and taking a simple random sample of size 1?
Solution: The correct option is d. There is no difference
<u>Explanation:</u>
Random sampling: In random sampling, each and every unit of the population has an equal chance of included in the sample.
Simple random sampling: In simple random sampling, also every unit of the population has an equal chance being included in the sample.
In the given situation, the selecting a member randomly from a finite population will be same as using a simple random sampling to select sample of size 1. Therefore, there is no difference between the two.
Answer:
232.5
Step-by-step explanation:
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I'm pretty sure the answers are
9-m
7-n