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· cnt-3
Counting Fundamentals · Product rule with restrictions
AMC 8 style
●●○○○ 4/10
~3 min
⏱ 0:00
A code consists of two distinct letters (A–Z) followed by two distinct digits. How many codes are possible?
product-rule
no-repetition
A
58500
58500
58500
B
60840
60840
60840
C
65000
65000
65000
D
67600
67600
67600
E
70200
70200
70200
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