Question 2
Ahmad wishes to open a door secured by a four-digit code corresponding to the word IMSO.
Each letter is assigned a digit subject to the following conditions:
(1) The letters I and O must be odd.
(2) The letters M and S must be even.
(3) All four digits must be distinct.
In how many ways can Ahmad enter the code?
Each letter is assigned a digit subject to the following conditions:
(1) The letters I and O must be odd.
(2) The letters M and S must be even.
(3) All four digits must be distinct.
In how many ways can Ahmad enter the code?