Ronna has volleyball practice every 4 days. Ronna also has violin lessons every 10 days. She has both activities today after sch
1 answer:
Answer:
She have both activities again on 20th day from now.
Step-by-step explanation:
Given :Ronna has volleyball practice every 4 days
Ronna also has violin lessons every 10 days.
To Find : When will she have both activities again on the same day?
Solution:
We will find the LCM of 4 and 10
2 | 4 ,10
2 | 2 , 5
5 | 1 , 5
| 1 , 1
So,
Hence she have both activities again on 20th day from now.
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Answer:
Keenan's z-score was of 0.61.
Rachel's z-score was of 0.81.
Step-by-step explanation:
Z-score:
Problems of normal distributions can be solved using the z-score formula.
In a set with mean and standard deviation
, the z-score of a measure X is given by:
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.
Keenan scored 80 points on an exam that had a mean score of 77 points and a standard deviation of 4.9 points.
This means that
So
Keenan's z-score was of 0.61.
Rachel scored 78 points on an exam that had a mean score of 75 points and a standard deviation of 3.7 points.
This means that . So
Rachel's z-score was of 0.81.