An email spam reaches three readers. Each of them forwarded the same email to three different readers. Each of these new readers
2 answers:
Answer: Second Option is correct.
Step-by-step explanation:
Since we have given that
Number of readers = 3
Each of them forwarded the same email to number of readers = 3
So, our equation becomes
Similarly, each of them again forwarded the same email to number of readers = 3
So, our equation becomes
Again each of them forwarded the same email to number of readers = 3.
So, our equation becomes
So, Number of people have read that email is given by
Hence, Second Option is correct.
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Answer:
4.27%
Step-by-step explanation:
We have been given that college students average 8.6 hours of sleep per night with a standard deviation of 35 minutes. We are asked to find the probability of college students that sleep for more than 9.6 hours.
We will use z-score formula to solve our given problem.
z = z-score,
x = Random sample score,
= Mean,
= Standard deviation.
Before substituting our given values in z-score formula, we need to convert 35 minutes to hours.
Now, we need to find .
Using formula , we will get:
Using normal distribution table, we will get:
Therefore, 4.27% of college students sleep for more than 9.6 hours.