48 Combinations of 2

Publish date: 2024-06-16
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Evaluate the combination:

48C2

Combination Definition:

A unique order or arrangement

Combination Formula:
nCr  =  n!
  r!(n - r)!

where n is the number of items
r is the unique arrangements.

Plug in n = 48 and r = 2
48C2  2  48!
  2!(48 - 2)!

Factorial Formula:

n! = n * (n - 1) * (n - 2) * .... * 2 * 1

Calculate the numerator n!:

n! = 48!

48! = 48 x 47 x 46 x 45 x 44 x 43 x 42 x 41 x 40 x 39 x 38 x 37 x 36 x 35 x 34 x 33 x 32 x 31 x 30 x 29 x 28 x 27 x 26 x 25 x 24 x 23 x 22 x 21 x 20 x 19 x 18 x 17 x 16 x 15 x 14 x 13 x 12 x 11 x 10 x 9 x 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1

48! = 12,413,915,592,536,072,528,327,568,319,343,857,274,511,609,591,659,416,151,654,400

Calculate (n - r)!:

(n - r)! = (48 - 2)!

(48 - 2)! = 46!

46! = 46 x 45 x 44 x 43 x 42 x 41 x 40 x 39 x 38 x 37 x 36 x 35 x 34 x 33 x 32 x 31 x 30 x 29 x 28 x 27 x 26 x 25 x 24 x 23 x 22 x 21 x 20 x 19 x 18 x 17 x 16 x 15 x 14 x 13 x 12 x 11 x 10 x 9 x 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1

46! = 5,502,622,159,812,088,456,668,950,435,842,974,564,586,819,473,162,983,440,384

Calculate r!:

r! = 2!

2! = 2 x 1

2! = 2

Calculate 48C2
48C2  =  12,413,915,592,536,072,528,327,568,319,343,857,274,511,609,591,659,416,151,654,400
  2 x 5,502,622,159,812,088,456,668,950,435,842,974,564,586,819,473,162,983,440,384

48C2  =  12,413,915,592,536,072,528,327,568,319,343,857,274,511,609,591,659,416,151,654,400
  11,005,244,319,624,176,913,337,900,871,685,949,129,173,638,946,325,966,880,768

48C2 = 1,128

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Excel or Google Sheets formula:
Excel or Google Sheets formula:=COMBIN(48,2)

What is the Answer?

48C2 = 1,128

How does the Permutations and Combinations Calculator work?

Free Permutations and Combinations Calculator - Calculates the following:
Number of permutation(s) of n items arranged in r ways = nPr
Number of combination(s) of n items arranged in r unique ways = nCr including subsets of sets
This calculator has 2 inputs.

What 2 formulas are used for the Permutations and Combinations Calculator?

nPr=n!/r!
nCr=n!/r!(n-r)!

For more math formulas, check out our Formula Dossier

What 4 concepts are covered in the Permutations and Combinations Calculator?

combinationa mathematical technique that determines the number of possible arrangements in a collection of items where the order of the selection does not matter
nPr = n!/r!(n - r)!factorialThe product of an integer and all the integers below itpermutationa way in which a set or number of things can be ordered or arranged.
nPr = n!/(n - r)!permutations and combinations

Example calculations for the Permutations and Combinations Calculator

Permutations and Combinations Calculator Video


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