arizza
Answered

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How many combinations exist of the letters W, X, Y, Z, taking two at a time?
04
06
012

Sagot :

culveryolanda46

Step-by-step explanation:

C(4,2)

Use combinations formula,

c(n,r)=n!/r!(n-r)!

c(n,r)=4!/2!(2!)

[tex]c = \frac{4 \times 3 \times 2 \times 1 }{2 \times 1 \times 2 \times 1} [/tex]

[tex]c = 3 \times 2 \times 1[/tex]

[tex]c = 6[/tex]

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