Interactive Chalkboard

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One Draw?
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How many black if a bag with a similar ratio has
red?
3 12
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What if we draw once from bag, replace the object
and draw from the bag once again?
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Set - list all
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Tree Diagram
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Matrix or Grid
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Combinations 4 4 4
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Adding the numbers on Two Dice
Web-Dice Applet
1 2 3 4 5 6
1 2 3 4 5 6
rolling x die   What's Up 
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Pull out two at a time without putting the object
back in the bag.
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arrangements
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Example 1-1a
At football games, a student concession stand
sells sandwiches on either wheat or rye bread.
The sandwiches come with salami, turkey, or ham,
and either chips, a brownie, or fruit. Use a tree
diagram to determine the number of possible
sandwich combinations.
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Example 1-1b
Answer The tree diagram shows that there are
18 possible combinations.
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Example 1-1c
A lunch buffet offers a combination of a meat, a
vegetable, and a drink for 5.99. The choices of
meat are chicken or pork the choices of
vegetable are carrots, broccoli, green beans, or
potatoes and the choices of drink are milk,
lemonade, or a soft drink. Use a tree diagram to
determine the number of possible lunch
combinations.
Answer 24 different dinners
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Example 1-2a
The Too Cheap computer company sells custom made
personal computers. Customers have a choice of 11
different hard drives, 6 different keyboards, 4
different mice, and 4 different monitors. How
many different custom computers can you order?
Multiply to find the number of custom computers.
Answer The number of different custom
computers is 1056.
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Medium
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Hard
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Challenge
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