Amerchant has coffee worth $20 a pound that she wishes to mix with 40 pounds coffee worth $40 a pound to get a mixture that can be sol for $30 a piund. how many pounds of the $20 coffee should be used?

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.)