9.) Simultaneously flip a dime and a quarter. If you see two tails, ignore that flip. If you see at least one head, record whether you see one or two heads. Repeat this experiment 30 times. Approximately what fraction of flips did the two coins show double heads?

10.) Suppose you have 3 identical, standard thumbtacks in your hands. You are told that the tacks land flat with 50% chance. Then what are the chances of all the tacks landing flat?

A. two-thirds

B. half

C. one-eighth

11.) What is the probability of rolling a sum of 07 or 9 with two fair dice? (round to two decimal places)

12.) You simultaneously flip a dime and roll a die. Make a table of all the possible outcomes. What is the probability of seeing Roosevelt and a 5? (round to two decimal places)

Suppose now that someone else flipped and rolled, did not show you the result, but reported that the die shows a 3. What is the probability that the dime is showing tails?(round to two decimal places)

13.) You roll two fair dice. What is the probability you will roll a double (two 1's, two 2's, two 03's, and so on)? (round to two decimal places)