Ms. Li must choose a passcode for her bank account. The passcode is to consist of 4 different digits from 0 to 9 inclusive except the first digit must be odd. How many different combinations for the passcode are there?
Ms. Li must choose a passcode for her bank account. The passcode is to consist of 4 different digits from 0 to 9 inclusive except the first digit must be odd. How many different combinations for the passcode are there?