In a certain city, all telephone numbers have six digits, the first two digits always being 41 o.... VIDEO
In a certain city, all telephone numbers have six digits, the first two digits always being 41 or 42 or 46 or 62 or 64 . How many telephone numbers have all six digits distinct? 📲PW App Link - https://bit.ly/YTAI_PWAP 🌐PW Website - https://www.pw.live
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