Homework * Answered - Due Jan 22nd, 11:59 PM Which of the following are true of C(n : r), the number of ways of choosing r items from n items? Multiple answers: Multiple answers are accepted for this question Select one or more answers and submit. For keyboard navigation... SHOW MORE a C(n;r)=n!/r ! b C(n;r)=C(n;nr) c C(n;r)=C(n1;r1)+C(n1;r) d C(n;0)+C(n;1)++C(n;n)=2n e C(n;r)=C(n1;r1)n/r