10C2
i know the answer is 45.
but for some reason, i can't get THAT answer. i keep getting something else....
anyone help me please?
thank you in advance!
10 C 2= $\displaystyle \frac{10!}{8!2!}$ after dividing denomonator and numerator by 8! the following is obtained$\displaystyle \frac{(9*10)}{(1*2)}=9*5=45$