## Basic Math and Pre-Algebra

**PART 5. Extra Practice**

**CHAPTER 21. Extra Practice**

**Part IV: Probability and Statistics**

For questions 111-115, assume that marbles are being drawn at random from a bag containing 5 red, 3 blue, and 2 yellow marbles.

111. If a single marble is drawn at random, what is the probability of drawing a blue marble?

112. If a single marble is drawn at random, what is the probability of drawing a red or a yellow marble?

113. A marble is drawn at random, recorded, and replaced in the bag, and then a second marble is drawn. What is the probability of drawing a yellow marble and then a blue marble?

114. A marble is drawn at random, recorded, and replaced in the bag, and then a second marble is drawn. What is the probability of drawing a blue marble and then a blue marble?

115. A marble is drawn, recorded, but not replaced in the bag. Another marble is drawn from the remaining marbles in the bag. What is the probability that both marbles are yellow?

116. Which two of the cities in this sample appear to have the lowest rate of job growth?

117. How many of the cities in this sample appear to have job growth rates above 2.5%?

118. When did the percent of adults smoking cigarettes show an increase?

119. During which years did the percent of adults smoking cigarettes remain relatively constant?

120. What percent of people said their favorite food was a fruit or vegetable?

6 |
12 |
14 |
16 |
16 |
18 |
20 |
22 |
26 |
28 |
30 |

121. Find the range.

122. Find the median.

123. Find the first and third quartiles.

124. Find the mean.

125. Find the standard deviation.