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Use groups of 2.
Materials: 2 number cubes with sides labeled 1 through 6, notebook paper
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Keep On Rolling |
 Make a table like the one shown below. Look at the first row labeled 10. Roll the number cubes. Find the sum of the numbers on the cubes and put a tally mark in the cell that matches the sum. Roll the cubes 9 more times, placing a tally mark for each sum. This row is now filled. Look at the second row labeled 25. Roll the number cubes 25 times, recording the sums with tally marks. Fill in the rows labeled 50 and 100 using the same procedure.
Make another table like the one shown below. Fill in the cells of the table with the experimental probability of each sum.
| Use the second table to answer these questions.
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What is the experimental probability of having a sum of 6 when rolling the dice 10 times? 25 times? 50 times? 100 times? |
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Describe how the experimental probabilities changed as you increased the number of rolls from 10 to 100. |
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| 25 |
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• Lesson 1-2