true or false if false correct the statement to make it true

True or False, if false correct the statement to make it true n_C_r = n_C_(n-r) for ail n and r n n_C_0 = 1 for all n n_C_r = n_P_r /n!

Solution

nCr = (n!) / ( r ! * (n - r)! )

First 2 statements are true.

3rd statement should be: nCr = nPr / r!

because nPr = n! / (n-r)!