Which of the following is an arithmetic sequence?

a) -2, 4, -6, 8,

b) -8, -6, -4, -2,

c) 2, 4, 8, 16,

any is greatly appreciated!

There are three bags: a (contains 2 white and 4 red balls), b (8 white, 4 red) and c (1 white 3 red). you select one ball at random from each bag, observe that exactly two are white, but forget which ball came from which bag. what is the probability that you selected a white ball from bag a?

Math question.. plz me .. best answer all

Use a standard normal table to determine the probability. give your answer as a decimal to four decimal places. −1.5< < 1.5)