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A recent study by a scientist from a college in Virginia says internet is what kids use more. Due to phones and gadgets

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Q: What do teenagers do more watch tv or surf the internet?
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Continue Learning about Statistics

There are 13 members on the board of directors for a hospital. In how many different ways can they elect a chair and a vice chair and a secretary?

Here is a problem in permutations where we use a non-replacement set as a base and draw different combinations of a given number of elements of the base to find a solution. What that means is that as we "use" an element of the set of probable choices, we do not replace it when selection of a second element is made. The first element is "used" only once. An individual is going to hold only one office on the board, as the question asked. We have 13 objects taken 3 at a time in non-replacement manner. As you may have guessed, there is a handy expression for finding the resultant in such a case. It is P(n, r). But we need to know the mathematical notation used in permutations. Let's look at that first. If we take a number (an integer) and multiply it by all the integers up to that number, we are finding what is called a factorial. When written in standard form, the factorial of a number n, is n! (read "enn factorial"), and it is equal to n x (n-1) x (n-2) x (n-3) x (n-4) ... x 4 x 3 x 2 x 1 Nothing trick here. Just take a whole positive number and multiply it by all the integers (counting numbers) up to that number. Piece of cake. The expression we mentioned, P(n, r) = P times n! divided by the quantity (n - r)! P = n! / (n - r)! P is the possible permutations, n is the number of elements in the set from which elements are selected, and r is the number of elements selected. Now we're ready to go to work. P(n, r) = P(13, 3) = 13! / (13 - 3)! = 13! /10! = 13 x 12 x 11 x 10! / 10! = 13 x 12 x 11 = 1716 There are 1716 possible ways to select three officers from among 13 candidates. Note that when we wrote out the solution, we used a short cut for 13! / (13 - 3)! and wrote it 13 x 12 x 11 x 10! / 10! so we could factor out 10! and get to the "easy" part (13 x 12 x 11) to discover our answer. Got a link to the Wikipedia post on permutations. (The link is below.) It's worth that little mouse "click" to surf on over and peek at what is there. It isn't that tough to understand. Since you got this problem, you'll doubtless get more like it - and tougher ones, too boot! Please do your homework. It is a must, and it is really not that tough. Good luck with this.


Related questions

What do teenagers do more according to nielson watch tv or surf the internet?

internet


Do teenagers watch more tv or surf the internet?

More tennagers go on the internet.I say that because theres more things to do and you can even watch tv on the internet.


What do teenagers do most watch tv or surf internet?

Most teenagers surf the internet.I say that because theres more things to do on the internet and you can even watch tv on the internet but you can't go on the internet with tv.That's why that's my answer.


Do more teenagers surf the web or watch tv?

More teenagers surf the web because they need the internet for homework and research projects. But a lot of teens watch TV too.


Which do teenagers do more surf the internet or watch tv?

According to Neilsen ratings June 2009, teens watch more TV than surf the internet...more than 3 times as much.


What does a teenager do more watch tv or surf the internet?

i thought it was surf the web but then i was watching a triva show were it said according to studies teenagers watch tv more.


Do teenagers watch tv or surf the internet?

surf the internet , I dont care what Money Drop Game show said !


Where on the internet can you watch full episodes of Make It Or Break It?

Check "surf the channel" at: http://www.surfthechannel.com/


Does internet run off of a satellite?

Not sure if I understand your question correctly, but if you are asking if satellite Internet is available the answer is yes. If you are asking if you can watch TV and surf the web at the same time, the answer is also yes. With Dish Network and Google TV you can surf the web and watch TV all on your television.


How does the internet help traveling?

The Internet encourages people to travel by showing the sites they have never seen before. The more people surf the Internet, the more they travel.


What were Anders Celsius' contributions the Chemistry?

many,,,you can surf in the internet for more info..


Can you play movies on netbook?

Yes you can watch movies, play games and more over you can also get connected to Internet and surf as well and also play games or even watch movies on the Internet. I recently tried playing the Secret of Monkey Island on a Intel Netbook, which is fairly good and good battery life of Netbook. Cool