It's in the Bag

Part 1: Will It Snow in Bozeman, Montana?

1. The bag in this activity will hold a total of 10 marbles. Assume 20 percent of those marbles are white.

   1. How many white marbles are in the bag? 2

   2. How many red marbles are in the bag? 8

2. Review your data from the investigation. Did snow fall in Bozeman?

   Yes No

   white = snow
   red = no snow

   Day 1	Red
   Day 2	Red
   Day 3	White
   Day 4	Red
   Day 5	Red
   Day 6	Red
   Day 7	Red
   Day 8	White
   Day 9	Red
   Day 10	Red

3. Based on the data you collected, answer the following questions:

   1. How many days did it snow in Bozeman? 2

   2. What is the percentage of days during this time that it snowed in Bozeman? 20

   3. Is this a higher or lower percentage of days than expected? Explain your answer.

      Higher Lower

      Explanation