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Mariulka [41]
3 years ago
12

If there are 12 people sitting at a round table , how many different pairs of people can have conversations during dinner, assum

ing the can all talk to each other? What geometric figure can you use t model this situation?
Mathematics
2 answers:
julsineya [31]3 years ago
7 0
66 different pairs. Use a dodecagon showing sides and angles
kherson [118]3 years ago
5 0

Answer:

Step-by-step explanation:

Given that there are 12 people sitting around at a table.

We see that any two persons can have conversations.  If we count A with B as one conversation this is the same as B with A

i.e. order does not matter

So here we have to use combinations.

2 people out of 12 where order does not matter can be done in 12C2 ways

No of conversations = 12C2\\= \frac{12!}{2!10!} \\=66

If we use a dodedecon as a geometrical figure with 12 vertices representing 12 persons the conversation between pairs can be associated with all diagonals and sides connecting two vertices.

Sides are 12 and diagonals are 54 totalling 66.

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Kisachek [45]

Answer:

D) 4

Step-by-step explanation:

|3| + |-1| = 3 + 1 = 4 \\

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3 years ago
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A set of piano prices distributed at a mean of 3000 and a standard deviation of 200 dollars. An electric piano has a price of 25
lana [24]

Answer:

The proportion of piano prices higher than the electric piano is 98.3%

Step-by-step explanation:

The first thing to do here is to calculate the standard score of the price of the electric piano given.

Mathematically, this is

z-score = (x-mean)/SD

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Now we proceed to calculate the probability of this z-score

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P(x>2576) = 1 - P(x<2576) = 0.983

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4 0
3 years ago
-5.5x+0.77=1.48 whats x
Nesterboy [21]

Answer:

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Hope this helps!

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
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Answer:

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Step-by-step explanation:

3:4 itself.

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