The following table shows the probability distribution for a discrete random variable.
x 13| 16 |17| 21| 23| 25 |26 |31
p(x) 0.07 |0.21| 0.17| 0.25| 0.05| 0.04| 0.13| 0.08
what is the mean of this discrete random variable. that is, what is e(x), the expected value of x?

Abaker makes 186 cookies. some are chocolate chip and some are oatmeal raisin, and both kinds are made with and without nuts, as shown in the table above. because they are more popular, the baker made 2/3 of the cookies chocolate chip. if a chocolate chip cookie is chosen at random, what is the probability that it will have nuts? a) 21/93 b) 21/62 c) 41/93 d) 21/41

The parabola x = y² - 9 opens: a.)up b.)down c.) right d.)left

According to the 2008 u.s. census, california had a population of approximately 4 × 10^7 people and florida had a population of approximately 2 × 10^7 people. which of the following is true? a. the population of california was approximately two times the population of florida. b. the population of florida was approximately twenty times the population of california. c. the population of florida was approximately two times the population of california. d. the population of california was approximately twenty times the population of florida.