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1 A monthly cell phone plan charges $5 for the first 300 text messages and then $0.15 for each additional message. On this plan, what is the number of text messages that must be used in a month in order to make the average cost per message $0.05?
5 A couple preparing for their wedding must choose 3 different arrangements of flowers from 10 choices and must choose 2 different cakes from 7 possibilities. How many different outcomes can there be for the couples choices of flowers and cakes?
6 A red marble and a blue marble are placed in a bag. One marble is drawn at random and then placed back into the bag. If this process is repeated 5 times, what is the probability of drawing a red marble 1 time and a blue marble 4 times?