In a class of 25 students, 24 of them took an exam in class and 1 student took a make-up exam the following day. The professor g
1 answer:
Answer:
The value is
Step-by-step explanation:
From the question we are told that
The total number of students is
The number of student that took exam in class is n = 24
The number that took make up exam is k = 1
The average score of the first 24 students is
The standard deviation is
The average score of the student who took make up test is
Generally the new average is mathematically represented as
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Step-by-step explanation:
Part (a):
Since new payment amount is 20% less than the original, we can write
New Earning = N = $18 - (20%) ($18)
N = (80%)($18)
N = 0.8 * 18
N = $14.4
Part (b):
New number of errors are one-third () of the initial 15 errors,
Therefore, new number of errors = E =
E =
E = 5
It is given that, earnings per error = n = 15 cents = $0.15
Thus, we can calculate the total earnings for new number of errors as follows,
New Total Earning = N = n * E
N = 0.15 * 5
N = $0.75
For this case we have:
By definition, two points are needed to find the equation of a line. We have a series of points given by:
We chose two points:
By definition, the formula of the slope is given by:
Substituting:
Being a line of the form , we substitute a point and the slope found to find the cut point b.
Thus, the equation of the line is given by:
Answer:
Option C