There are a total of 4 combinations of 3 digit combinations using only 4 digits
The number of 3 digit combinations of any group of numbers is calculated using:
Combination = [tex]^nC_r[/tex]
Where:
n = the available digits
r = 3 i.e. the digits to combine
When the value of n is 4, the equation becomes
Combination = [tex]^4C_3[/tex]
Apply the combination formula
Combination = 4
The lowest and the highest number depend on the value of each digit to be combined
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