In a supermarket, the amount of tills needed is directly proportional to the number of customers waiting. A supermarket will open 7 tills if there are 161 customers in the shop. Show that 12 tills are needed if the number of customers rises to 276.

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.)