Which statement about the simplified binomial expansion of (a + b)^n, where n is a positive integer, is true?

Question

anonymous · Answer

Possible answers include....
The value of the binomial coefficient nC0 is n – 1 for all values of n.
The values of nC1 and nCn–1 are equal to 1.
The values of nC0 and nCn are equal to 1.
The value of the binomial coefficient nC1 is n – 1 for all values of n.

anonymous · Answer

Those question marks are subtraction signs.

anonymous · Answer

@Nnesha

campbell_st · Answer

have you ever seem pascal's triangle ?

campbell_st · Answer

or you could calculate using the combination formula 

$$^n C _{r} = \frac{n!}{r!(n - r)!}$$

so let r = 0 and calculate the value... and then r = n and calculate the value

and remember  0! = 1

anonymous · Answer

Ok, I got it. The answer is C. Thank you.

campbell_st · Answer

correct