Help Build Math Skills: Marble Probability

This team game can be played with simple household items. The players use the knowledge of how many marbles of each color they have to try and correctly predict what colors they will draw from the can. Try keeping track of each team's correct prediction over the course of several games to determine which team has the best overall prediction record.

What this activity will develop:
Math, thinking and social skills

What you'll need:
• Bowl
• Two colors of marbles (12 each)
• Two coffee cans
• Pencils
• Paper

What to do:
1. The players divide into two teams. Each team picks six mar- bles, in any combination of the two colors, to put in its coffee can.

2. Each team tells the other the number of each color in its can. For example, "Our team has four blue marbles and two red ones.

3. The members of one team predict the number of marbles of each color that they will draw, two at a time, from the other team's can. One member of the team writes the prediction on a sheet of paper. For example, "We will draw one blue and one red."

4. A member from each team draws two marbles from the other team's can without looking.

5. The marbles drawn are compared to the team's prediction. If the prediction was correct, the team keeps the marbles and sets them aside. If the prediction is incorrect, the team returns the marbles to the other team's can. The first team to collect all the marbles wins.

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