Answer: Option a) 3
Step-by-step explanation:
The formula for calculating combinations is as follows
[tex]nCr = \frac{n!}{r!(n-r)!}[/tex]
Where "n" is the amount of items in a set and you can choose "r" from them
3C1 reads as: The combination of 1 in 3. You have a set of 3 elements and choose 1 of them.
[tex]n = 3\\\\r = 1[/tex]
So :
[tex]3C1=\frac{3!}{1!(3-1)!}\\\\3C1=\frac{3!}{1!*2!}\\\\3C1=\frac{3*2*1}{1*2*1}\\\\3C1=3[/tex]
