Probability and Two-Way Tables — Unit test Answers

What is the common ratio of the geometric sequence below?625, 125, 25, 5, 1, ...

Lola pulls two marbles from a bag containing four red marbles, four blue marbles, and 12 yellow marbles without replacing them.What is the probability that she pulled out a red marble first and a yellow marble second? Express your answer in decimal form, rounded to the nearest hundredth.

Seventy-five percent of the flowers in the arrangement are roses and the rest are tulips. Of the tulips, 50 percent are pink.To the nearest whole percent, what is the probability that a randomly chosen flower from the arrangement is a pink tulip?

The two-way table shows the preferred vacation destination for people in different age groups.Which statement is true?

What is the common difference in the following arithmetic sequence? 2.8, 4.4, 6, 7.6, ...