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nignag [31]
3 years ago
7

Sarah needs to go to five different stores. How many ways can she go to two of them before lunch?

Mathematics
1 answer:
Zina [86]3 years ago
6 0

Answer:

10

Step-by-step explanation:

Solution 1: At first, you might think that because there are 5 ways to choose the first store and 4 ways to choose the second store, the answer is 5 * 4 = 20 but this is over-counting by a factor of 2. Say that two of the stores are A and B. If she went to A then B, that's the same as going to B then A since you still go to the same stores, therefore, the answer is 20 / 2 = 10.

Solution 2: We need to find the number of ways to choose 2 stores from 5, we can do this by calculating ₅C₂ which equals:

5! / 2!  * 3!

= 5 * 4 * 3 * 2 * 1 / 2 * 1 * 3 * 2 * 1

= 5 * 4 / 2 * 1

= 10

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Answer:

(b) 19% is a parameter, 22% is a statistic.

Step-by-step explanation:

-A parameter is defined as characteristic of a population under study.

In this case , the population is all cars manufactured and the characteristic of whiteness is exhibited by 19% of them.

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3 years ago
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Answer:

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Step-by-step explanation:

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a tree 20 feet tall with a circumference of 3 ft has a vine wound around 7 times. How long is the vine?
FinnZ [79.3K]

If the tree is 20 feet tall with circumference 3 feet then the length of  vince is around 21 feet.

Given the height of tree is 20 feet and the circumference of tree is 3 feet.

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Circumference is the perimeter of a circular object. Because the trunk of a tree is in shape of circle so the perimeter of the trunk is 2πr.

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Circumference=2πr

Because vine is 7 times the circumference so the length of vine being:

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Hence if the tree is 20 feet tall with circumference 3 feet then the vince is around 21 feet long.

Learn more about circumference at brainly.com/question/20489969

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saveliy_v [14]

Answer:

x = 2

Step-by-step explanation:

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3 years ago
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