A seven-digit combination lock on a safe has zero exactly three times, does not have the digit 1 at all. What is the probability that exactly 3 of its digits are odd?
(a) 21
(b) 31
(c) 61
(d) 164
(e) 169
(a) 21
(b) 31
(c) 61
(d) 164
(e) 169
