Question

What does $N$ mean in math?

Answer 1

The alphabet $N$ has various meanings in mathematics.

• $N$is used to denote the set of all the natural numbers. The natural numbers are non-zero, positive whole numbers. $N=\left\{1,2,3,4,........\right\}$
• In geometry, $n$ can be used to name a line and $N$can be used to name a point.
• In statistics, $N$ is the number of observations in the sample and $N$ is the number of observations in the population.
• In algebra, $n$can be used to name an unknown variable in the same way the other alphabets are used.
• In the SI unit system, the unit of force is Newton which is denoted by $N.$
• The formula of combination is ${}^{n}C_r=\frac{n!}{r!\left(n-r\right)!}$, where $r$ items are chosen from $n$ number of items without replacement and the order of items does not matter.
• The formula of combination is ${}^{n}P_r=\frac{n!}{(n-r)!}$, where $r$ items are chosen from $n$ number of items without replacement, and the order of items matters.