SOLUTION: a code is to consist of three digits followed by three letters. Find the number of possible codes if the first cannot be 0 or 1 and replacement is not permitted?
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Question 928472: a code is to consist of three digits followed by three letters. Find the number of possible codes if the first cannot be 0 or 1 and replacement is not permitted?
Answer by tommyt3rd(5050) (Show Source): You can put this solution on YOUR website!
1st digit: 8 choices
2nd: 9 choices left
3rd: 8 choices left
1st letter: 26 choices
2nd: 25 choices left
3rd: 24 choices left
Total:
8*9*8*26*25*24 = 8985600
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