Answer:

Step-by-step explanation:
Let t represent the number of years since 2005.
We have been given that the number of people afflicted with the common cold C in the winter months steadily decreased by 202 each year from 2005 until 2010.
The number of people decreased in t years would be
.
We are also told that in 2005, 12,073 people were afflicted. So 12,073 will be initial value.
We will represent our given information in an equation as
, where,
m = Slope of line,
b = The initial value.
Since the number of people afflicted with the common cold C in the winter months steadily decreased, so slope will be negative.
Substitute the given values:

Therefore, our required equation would be
.
Answer:

Step-by-step explanation:
From the question we are told that:
Percentage of student to get A 
Sample size 
Generally Number of student to get A is



Therefore
Probability that one student gets an A grade is mathematically by





The answer is 44/15 which is not an option.