High School

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Every morning, a deli offers a "commuter special" where customers can select a pastry, beverage, and a copy of one of the local papers for \$1.00. Their options are listed in the table below.

[tex]\[
\begin{tabular}{|c|c|c|}
\hline
\multicolumn{3}{|c|}{Commuter Special} \\
\hline
Pastry & Beverage & Paper \\
\hline
Donut & Coffee & The Times \\
\hline
Brownie & Milk & The Herald \\
\hline
Muffin & Tea & \\
\hline
Scone & Orange Juice & \\
\hline
Croissant & & \\
\hline
\end{tabular}
\][/tex]

Last Tuesday, the deli did not have any muffins. How did that affect the number of possible combinations?

A. It decreased the number of combinations by 8.
B. It decreased the number of combinations by 10.

Answer :

To solve the problem of determining how the absence of muffins affected the number of possible combinations for the "commuter special" at the deli, follow these steps:

1. List all Options:
- Pastries: Donut, Brownie, Muffin, Scone, Croissant
- Beverages: Coffee, Milk, Tea, Orange Juice
- Papers: The Times, The Herald

2. Calculate Total Combinations Initially:
- Each customer chooses one item from each category.
- Initially, there are 5 pastries, 4 beverages, and 2 papers.
- Total combinations before removing muffins = 5 pastries × 4 beverages × 2 papers = 40 combinations.

3. Remove Muffins from Options:
- Due to the absence of muffins, the number of available pastries is reduced by one.
- Now, there are 4 pastries instead of 5.

4. Calculate New Total Combinations:
- With one less pastry, there are 4 pastries, 4 beverages, and 2 papers.
- Total combinations after removing muffins = 4 pastries × 4 beverages × 2 papers = 32 combinations.

5. Determine the Decrease in Combinations:
- The decrease in combinations is the difference between the initial and the new total:
- Decrease = Initial combinations - New combinations = 40 - 32 = 8.

Therefore, the absence of muffins decreased the number of possible combinations by 8.

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Rewritten by : Jeany