# Question: What Does Comma Mean In Math?

## What does a comma mean in a number?

In large numbers, commas are used to help the reader. A comma is placed every third digit to the left of the decimal point and so is used in numbers with four or more digits.

## What does this symbol mean in math?

This symbol > means greater than, for example 4 > 2. ≤ ≥ These symbols mean ‘less than or equal to’ and ‘greater than or equal to’ and are commonly used in algebra.

## What does a comma mean in set notation?

notation. Let X={x∈X:x satisfies condition A,x satisfies condition B}. Does the comma in above set notation mean that x has to statisfy A and B at the same time or only one of those; so that we have: X is the union of XA={x satisfiesA} and XB={x satisfiesB}? Share.

## What does a comma mean in probability?

It’s common to use commas to denote set intersection. That is, P(A,B)=P(A∩B). One also sometimes sees this written simply as P(AB). In natural language, P(A,B∣C) becomes something like “the probability of A and B given C.”

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## What are the 8 rules for commas?

Commas ( Eight Basic Uses)

• Use a comma to separate independent clauses.
• Use a comma after an introductory clause or phrase.
• Use a comma between all items in a series.
• Use commas to set off nonrestrictive clauses.
• Use a comma to set off appositives.
• Use a comma to indicate direct address.
• Use commas to set off direct quotations.

## Do you put a comma after a number?

Numbers. Most authorities, including The Associated Press Stylebook and The Chicago Manual of Style, recommend a comma after the first digit of a four-digit number. The exceptions include years, page numbers, and street addresses. We sold 1,270 rare books last year; the most expensive sold for \$5,255.

## What does the * mean in texting?

Asterisk. Meaning: You’re afraid the person isn’t as cool as you. The main reason people use asterisks in a text is to censor a word, for example: “I like deep-fried sandwiches so my friends call me the C*** of Monte Cristo. Little do they know I’m plotting my elaborate revenge on them.”

## What is the name of this symbol?

This table contains special characters.

Symbol Name of the Symbol Similar glyphs or related concepts
& Ampersand
⟨ ⟩ Angle brackets Bracket, Parenthesis, Greater-than sign, Less-than sign
‘ ‘ Apostrophe Quotation mark, Guillemet, Prime, foot (unit), minute
* Asterisk

## What does R mean in math?

In maths, the letter R denotes the set of all real numbers. In other words, real numbers are defined as the points on an infinitely extended line. This line is called the number line or the real line, on which the points of integers are evenly ranged.

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## How do you write a set?

Notation: A set is usually denoted by capital letters, i.e. A,B,C,…,X,Y,Z,… etc., and the elements are denoted by small letters, i.e. a,b,c,…,x,y,z,… etc. If A is any set and a is the element of set A, then we write a∈A, read as a belongs to A.

## What does a comma mean in logic?

The comma is there to separate two items in a set.

## How do you read set notation?

Set Membership We use the symbol ∈ is used to denote membership in a set. Since 1 is an element of set B, we write 1∈B and read it as ‘1 is an element of set B’ or ‘1 is a member of set B’. Since 6 is not an element of set B, we write 6∉B and read it as ‘6 is not an element of set B’ or ‘6 is not a member of set B’.

## What does a comma mean in Excel?

In this case the comma is a separator for different sections of the formula. there are other formulas where the “,” could be a text section being looked. for or as a result. for example if you wanted to replace a comma with a.

## What does a comma mean in fractions?

3. In this case, the comma is used to separate items as a list. It is a casual, shorthand way of saying “the solutions to x2−3x+2=0 are x=1 and x=2.” We must be careful, though, as x=1,2 could be read as x=1.2 in the European style.

## What does a vertical line mean in probability?

The vertical bar is often called a ‘pipe’. It is often used in mathematics, logic and statistics. It typically is read as ‘given that’. In probability and statistics it often indicates conditional probability, but can also indicate a conditional distribution.