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Aneli [31]
3 years ago
12

On a standardized exam, the scores are normally distributed with a mean of 79 and a standard deviation of 20. Find the z-score o

f a person who scored 121 on the exam.
Mathematics
1 answer:
Anit [1.1K]3 years ago
3 0

Answer:

z = 2.1

Step-by-step explanation:

z=\frac{x-\mu}{\sigma}\\ \\z=\frac{121-79}{20}\\ \\z=\frac{42}{20}\\ \\z=2.1

This tells us that the person's score of 121 places them 2.1 standard deviations above the mean score of 79.

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you are allowed to multiply as many 2's and/or as many 5's as you want. What can be the last didget of your result
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Based on the fact that you are allowed to multiply as many 2's and/ or as many 5's as you want, the last digit of your result can be either a 2, 5 or 0.

<h3>What is the last digit of your result?</h3>

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There is a fraction equivalent to 6/7. The sum of the numerator and the denominator is 78. What is the fraction
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