Marie's clothing store buys coats for $50 and then sells them for $80. What is the percent markup on the price of the coats?

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.

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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.)