0
Start out with small cases and you will see the pattern. At that point, you might even guess what the formula is. So let's ay the room has only A and B---two people. there is one handshake
(A with B). Three people (A, B, and C), there are three handshakes
(A with B and C; B with C). Now, let's try four people (A, B, C, and D), there are six handshakes
(A with B, C, and D; B with C and D; C with D). So if we have n+1 people, the number of handshakes is the sum of the first n numbers. This is n(n+1)/2 So for 6 people it is the sum of the first 5 numbers, which is 1+2+3+4+5=15 or 5x6/2=30/2=15 Another way to think of this, if you have done some combinatorics, is for 6 people, in how many ways can you pick two. This is 6C2 or 6x5/2= 15
What else can I help you with?
What is the fifth root of fifteen equal to?
The fifth root of fifteen = 1.718772
What is two thirds of fifteen?
9
What is fifteen hours after 1200 noon?
3:00 am
What is the lowest common denominator of eight twelve and fifteen?
1
What is 'thirty and fifteen thousandths' in numbers?
When the word "and" separates the numbers it lets you know the number is a mixed number. For example: Twenty-four dollars and fifteen cents = $24.15 (or 24 15/100).Thirty is the whole number: 30Fifteen-thousandths is the fraction: 15/1000To express 15/1000 in decimals, then divide the denominator into the numerator: 15/1000 = .015Thirty and fifteen-thousandths = 30.015
How many handshakes if 6 people?
If six people meet there are fifteen handshakes.
What can be done if fifteen minutes?
You can brush your teeth.Another AnswerYou can count fifteen minutes. Another AnswerYou can save fifteen percent on car insurance. :D
Write another name for the number 15?
Fifteen.
Which is another way to write 16.015?
sixteen and fifteen thousands
Where is the Fifteen Restaurant located?
Jamie Oliver's "Fifteen" restaurant is located at 15 Westland Place, London, N1 7LP. The restaurant resulted from a television programme where Jamie took on "challenged" teenagers and taught them to cook. It now has its own apprentice scheme to carry on this work.
How old is NIGHTS?
nights is fifteen sme as sonic another sega character
Is fifteen a noun?
Yes, a number can be a noun, or pronoun. It acts as an adjective when it appears with another noun.
What is the gcf of 10 15?
One because there isnt another factor in 10 and fifteen that are the in the same group
What describes properly controlled experiment?
fifteen turtles are fed iceberg lettuce and vitamins, while another fifteen turtles are fed only iceberg lettuce APEX
What is fifteen add fifteen add fifteen add fifteen?
15+15+15+15=60
How long is fifteen feet?
Fifteen feet is fifteen feet long.
How do you write fifteen thousand fifteen hundred and fifteen dollars in numbers?
Fifteen thousand, fifteen hundred, and fifteen dollars can be written numerically as $15,515. This is because fifteen thousand is written as 15,000, fifteen hundred is written as 1,500, and fifteen is written as 15. When you add these numbers together, you get a total of 15,000 + 1,500 + 15 = 15,515.
