6/10 and 13/20, sorry i would explain this but its late, cheers.
Hope this Helps.
1. (-0.5,1.5)
2. (-3,1)
3. (2,3)
4. (5,15)
The probability that she will draw 2 letters is 65/126.
Answer:
B. $1750
Step-by-step explanation:
The mean of the discrete uniform distribution is given by:

In this problem, we have that
.
The expected time to find the car is:

7 hours are expected to find the car.
The helicopter costs $250 per hour to rent.
7*$250 = $1750
So the correct answer is:
B. $1750