1.  The singular form of the word "dice" is "die". Tom was throwing a six-sided die. The first time he threw, he got a three; the second time he threw, he got a three again. What's the probability of getting a three at the third time?

2. There are 30 table tennis balls in the box: 6 are green, 10 are red, and 14 are yellow. If you shake the box and then randomly select one ball from the box, what's the probability that you will get a red one:

3. Rachel was flipping a coin with Jerry. She told jerry: "I am able to get all heads in two tosses." Jerry laughed at her: "No, the probability of getting two heads at two tosses is only__"

4. Jennie and Alex both wanted to get a free ticket for a College Music concert. However, the concert staff told them the tickets were limited. Twenty people wanted to attend the concert but only 10 free tickets were left. So the concert center staff decided to use a lottery to decide who would receive the free tickets. What's the probability of Jennie and Alex both getting free tickets?

5. Laura and Melissa were playing dice. What the probability of Laura and Melissa both getting a 6?

6.  In a statistics class with 36 students, the professor wanted to know the probability that at least two students share the same birthday. The probability will be___

a. 0.1

b. Much smaller than 0.1

c. Much bigger than 0.1

d. Not possible

7.  If you throw a die for two times, what is the probability that you will get a one on the first throw or a one on the second throw (or both)?

8.  Jerry got a box full of colorful candy balls. There were 50 of them: 20 red, 10 green, 12 yellow and 8 blue. After shaking the box, he randomly selected 2 candy balls from the box. What's the probability that the first one was blue and the second one was yellow?

9.  Jerry got a box full of colorful candy balls. There were 50 of them: 20 red, 10 green, 12 yellow and 8 blue. After shaking the box, he randomly selected 2 candy balls from the box. What's the probability that the first is blue and the second one is also blue?

11.  (11) Many researchers have argued that the TB skin test is not accurate. Imagine that the TB skin test is only 70% accurate. Sarah is thinking about having the test. Before she has the test she wonders the probability that she has TB. The probability of Sarah having TB is ...

a. 70%

b. 35%

c. 30%

d. More information needed to calculate