Answer Happy

The manager of a motorcycle store wants to sell the motorcycles
that he has in stock from the previous season, for this he launches
his offer of said motorcycles, after the day he checks how many he
has sold. For a certain number of days, the number of motorcycles
offered (X) and the number of motorcycles sold (Y) are presented,
which are jointly distributed according to the following
distribution:
1. The manager wants to analyze the relative variation in the
number of motorcycles sold conditional on the number of motorcycles
offered. .
What is the average number of motorcycles sold when the number of
motorcycles offered is 10 units?
What is the variance of the number of motorcycles sold when the
number of motorcycles supplied is 10 units?
What is the relative variation in the number of motorcycles sold
when the number of motorcycles supplied is 10 units?
2. The manager is interested in finding the probability that the
number of motorcycles offered is more than twice the number of
motorcycles sold. What is the value of the correct answer?
Х 9 10 11 12 1 0.152 0.010 0 0.125 Y 3 0.220 0.143 0.238 0.021 6 0.016 0.040 0.010 0.025