Answer:

Step-by-step explanation:
From the question we are told that
Sample mean 
Standard deviation 
Probability of 
Generally the equation for
is mathematically given as


Therefore The probability that a randomly selected truck averages fewer than 10 miles per gallon

Answer:
68
Step-by-step explanation:
the reason it is 68 is because its a reflection on the other side which that line is there also represents the other side so it is 68.
Answer:
If a person selected at random from this group is a man, there is a 31.25% probability that the person favors raising the drinking age.
Step-by-step explanation:
We have these following informations:
There are 1000 people in total.
540 favored raising the age. Of them 390 were female, and 540-390 = 150 were male.
460 were opposed. Of them, 130 were female and 460-130 = 330 were males.
If a person selected at random from this group is a man, what is the probability that the person favors raising the drinking age?
There are 150+330 = 480 males. Of them, 150 favors raising the drinking age.
So

If a person selected at random from this group is a man, there is a 31.25% probability that the person favors raising the drinking age.