Question

A restaurant offers a special pizza with 4 toppings. If the restaurant has 12 topping from which to choose, how many different special pizzas are possible?

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Answer to a math question A restaurant offers a special pizza with 4 toppings. If the restaurant has 12 topping from which to choose, how many different special pizzas are possible?

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Madelyn
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86 Answers
To find the number of different special pizzas that can be made, we need to find the number of combinations of choosing 4 toppings out of 12 available toppings.

We can use the combination formula to solve this problem. The combination formula is given by:

C(n, r) = \frac{{n!}}{{r!(n-r)!}}

Where:
- n is the total number of items
- r is the number of items that we are choosing

In this case, we have 12 toppings to choose from and we want to choose 4 toppings. So we can plug in these values into the combination formula:

C(12, 4) = \frac{{12!}}{{4!(12-4)!}}

Now, let's simplify the expression:

C(12, 4) = \frac{{12!}}{{4!8!}}

Now, let's calculate the factorials:

C(12, 4) = \frac{{12 \times 11 \times 10 \times 9 \times 8!}}{{4! \times 8!}}

We can cancel out the 8! terms:

C(12, 4) = \frac{{12 \times 11 \times 10 \times 9}}{{4!}}

Simplifying further:

C(12, 4) = \frac{{12 \times 11 \times 10 \times 9}}{{4 \times 3 \times 2 \times 1}}

C(12, 4) = 12 \times 11 \times 10 \times 9 \times \frac{{1}}{{4 \times 3 \times 2 \times 1}}

C(12, 4) = 12 \times 11 \times 10 \times 9 \times \frac{{1}}{{24}}

Now let's calculate the product:

C(12,4)=12\times11\times10\times9\times\frac{{1}}{{24}}=495

Therefore, there are 495 different special pizzas that can be made from the 12 available toppings.

Answer: 495

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