Rivers Casino did an audit of all of their blackjack tables and found that the amount of money.What is the probability

Let X represent the difference between the number of heads and the number of tails obtained when a coin is tossed n times.
What are the possible values of X?

Based on the Normal model N(100, 16) describing IQ scores, what percent of peoples

Let X be a normal random variable with mean 12 and variance 4. Find the value of c such that P{X>c}=.10.

Determine whether this table represents a probability distribution.
$$\begin{array}{|cc|}\hline x& P(x)\\ 0& 0.05\\ 1& 0.3\\ 2& 0.25\\ 3& 0.4\\ \hline\end{array}$$
A. Yes, it is a probability distribution
B. No, it is not a probability distribution

The table shows the results of a survey of 100 authors by a publishing company.
$$\begin{array}{|cccc|}\hline & \text{New Authors}& \text{Established Authors}& Total\\ Successful& 15& 30& 45\\ Unsuccessful& 20& 35& 55\\ Total& 35& 65& 100\\ \hline\end{array}$$
Compute the following conditional probability. (Enter your probability as a fraction.)
An author is established, given that he is unsuccessful.

The following probability table is a breakdown of managers in four setors of economy:
$$\begin{array}{|ccccc|}\hline & Banking& Insurance& RealEstate& Manufacturing\\ Male& 0.12& 0.14& 0.13& 0.21\\ Female& 0.08& 0.06& 0.17& 0.09\\ \hline\end{array}$$
a) What is the probability that the selected manager is female?
b) What is the probability that the selected manager is female or in insurane business?
c) What is the probability that the selected manager is neither female nor in insurance business?

Consider the following discrete probability distribution. What is the probability that x equals 7?
$\begin{array}{|ccccc|}\hline x& 3& 4& 7& 9\\ P(X=x)& 0.22& 0.17& ?& 0.18\\ \hline\end{array}$