Chapter 4, page 159, exercise 25
A local bank reports that 80 percent of its customers maintain a checking account, 60 percent have a savings account, and 50 percent have both. If a customer is chosen at random, what is the probability the customer has either a checking or a savings account? What is the probability the customer does not have either a checking or a savings account?

Chapter 4, page 165, exercise 36
Dr. Stallter has been teaching basic statistics for many years. She knows that 80 percent of the students will complete the assigned problems. She has also determined that among those who do their assignments, 90 percent will pass the course. Among those students who do not do their homework, 60 percent will pass. Mike Fishbaugh took statistics last semester from Dr. Stallter and received a passing grade. What is the probability that he completed the assignments?

Chapter 3, page 79, exercise 47
The Houston Texas Motel Owner Association conducted a survey regarding weekday motel rates in the area. Listed below is the room rate for business class guests for a sample of 10 motels:
$ 101 $ 97 $ 103 $ 110 $ 78 $ 87 $ 101 $ 80 $ 106 $ 88

One problem attached
There are nine tennis balls in a box, of which only 5 have not previously been used. Four of the balls are chosen randomly from the box....Find the probability distribution, Evaluate the expectation, Evaluate the variance

Please help with the following probability problems. Provide step by step calculations for each statistics question.
The probability that a pumpkin seed will germinate is 70%. A gardener plants in batches of 12.
a. What is the probability that exactly 10 seeds will germinate?
b. What is the probability that 10 or mo

What are the expected value andvariance of the following probability distribution?
random variable x v. probability
1 0.05
2 0.05
3 0.10
4 0.10
5 0.15
6 0.15
7

In a lab experiment involving inorganic syntheses of molecular precursors to organometallic ceramics, the final step of a five-step reaction involves the formation of a metal-metal bond. The probability of such a bond forming is p = 0.20. Let X equal the number of successful reactions out of n = 25 such experiments.
a) Find the

Let X and Y have joint probability mass function Pr{X = i, Y = j}= c(i + 1)(j + 2) for
i >= 0, j >= 0, and i + j < 4. Determine
a) the marginal probability mass function of X
b) the probability mass function of Y
c) the conditional probability mass function of X given Y = 0
d) the probability mass function of Z = X + Y

For the given p.d.f.'s
Find the m.g.f. M(t)
Find the values of meanandvariance
Determine and Sketch the graph of the distribution function of X.
Sketch the graph of the p.d.f. of X.
calculate the value of c so that f(x) is a p.d.f.

Please help find the following with the data attached:
- Expected duration of activity H
- Variance of activity H time
- Critical path based on expected activity durations
- Probability of completing this path in 22 weeks or less

Expectation andvariance of a random variable
Let X be a random variable with the following probability distribution:
Value x of x P(X=x)
-30 0.35
-20 0.25
-10 0.05
0 0.30
10 0.05
Find the

** Please see the attached file for the complete problem description **
1. Find the Expected Value, the Varianceand the Standard Deviation
for the random variable with the following probability distribution:
(please see the attached file)
2. Calculate the following expressions with factorials:
a) 5! b) 6!/4!
3. Us