there are only 4 even nonzero digits
2 are already used, leaving 2 choices possible
there are 5 odd digits, making 7 choices in all.
??
A locker combination has three nonzero digits, and digits cannot be repeated. If the first two digits are even, what is the probability that the third digit is even?
A) 7/9
B) 1/3
C) 1/6
D) 1/7
1 answer