Find the sum of the first 16 terms for the following arithmetic sequence. a2=2,a4=6

Someone . me. compound probability

Suppose i pick a jelly bean at random from a box containing one red and eleven blue ones. i record the color and put the jelly bean back in the box. if i do this three times, what is the probability of getting a blue jelly bean each time? (round your answer to three decimal places.)

I’m stuck on this equation, anyone got the answer?