Step 2 - Identify which formula we use to prove certain properties of polygons.
1 answer:
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Answer:
Step-by-step explanation:
If we have a pizza that has slices and we want to split it between 4 friends, then each friend will get
slices.
Now, Harris is one of those friends so he receives slices, but he eats one less than he receives. Therefore, we subtract one from this expression to get our final answer of
.
Hope this helped!
There are 330 different ways for choosing a dozen donuts from the 4 varieties at a donut shop. (at least one donut of every variety must be selected)
<h3>How to calculate the number of ways to select items?</h3>There are 'r' items from 'n' different varieties (repetition allowed). Then, the number of ways to select items is given by
The number of ways =
Where the combination is calculated as
It is given that there are 4 varieties of donuts in a shop. I.e., n = 4
Number of donuts to be selected r = 12 (one dozen)
And also given that at least one donut of every variety has to be selected.
Since there are 4 varieties, at least one from each of these means the count is 4.
So, the remaining number of donuts to be selected is 12 - 4 = 8.
So, r becomes 8 i.e., r = 8
On substituting,
the number of ways of selecting the remaining 8 donuts =
⇒
⇒
⇒
⇒ 330
Therefore, there are 330 different ways for choosing a dozen donuts from the 4 varieties at a donut shop.
Learn more about combinations here:
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