John runs a computer software store. Yesterday he counted 137 people who walked by his store, 68 of whom came into the store. Of the 68, only 45 bought something in the store. c). Estimate the probability that a person who walks by the store will come in and buy something. d). Estimate the probability that a person who comes into the store will buy nothing.

John runs a computer software store. Yesterday he counted 127 people who walked by his store, 58 of whom came into the store. Of the 58, only 25 bought something in the store. For each of the following questions, answer using probability notation. Estimate the probability that a person who walks by the store will enter the store.

In a blood testing procedure, blood samples from 6 people are combined into one mixture. The mixture will only test negative if all the individual samples are negative. If the probability that an individual sample tests positive is 0.08, what is the probability that the mixture will test positive? Give your answer as a percent rounded to the nearest tenth of a percent.

Draw two cards from a deck. Find the probability of drawing an ace with draw #1, then with draw #2. Explain your answer.