HELP IM IN A MIDDLE OF A TEST!! A locker combination has four nonzero digits. If no digit can be repeated and the first three digits are 1-2-3, what is the probability that the fourth digit is 4?
A.) 1/6
B.) 1/7
C.) 1/8
D.) 1/9
NO LINKS PLEASE
i believe the answer would be . there are 9 possible numbers and you can't repeat them therefore taking out 1, 2, and 3. that leaves 7 possible numbers therefore it would be a 1/7 chance of getting 4.
