en

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

13 choose 2

Solution

13c2

Solution

78

Solution steps

= \frac{n !}{r ! ( n - r ) !}

Plug in

n = 13, r = 2

= \frac{13 !}{2 ! ( 13 - 2 ) !}

\frac{13 !}{2 ! ( 13 - 2 ) !} = 78

= 78

Popular Examples

std of 9,9,9,9,9,9,9 standard deviation

9, 9, 9, 9, 9, 9, 9

std of 21,31,36,45,49,58,61,63,64,65,66,68,71,73,74,78,81,92 standard deviation

21, 31, 36, 45, 49, 58, 61, 63, 64, 65, 66, 68, 71, 73, 74, 78, 81, 92

std of 7,15,-7,-4,-1 standard deviation

7, 15, - 7, - 4, - 1

6 c 4

10 n C r 0

Frequently Asked Questions (FAQ)

What is 13 choose 2 ?
The answer to 13 choose 2 is 78