Question

Evaluate the expression: 23C3

Answer 1

This looks like
`(23!)/((23-3)!*3!)`. Simplify this down to
`(23*22*21)/(1*2*3)`. This simplification gives you that 23C3 = 1771. You would have gotten the same result had you drawn out Pascal's Triangle to 24 rows and gone in 3 in that row. That would have been your 1771. Whichever is easiest is the way I recommend.