What is the worst case number of combinations

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Reference no: EM132152112

A thief walks up to an electronic lock with a 10-digit keypad and he notices that the 1, 4, 5, and 8 keys physically seem to be the keys used to open the lock.

He thus safely assume that the 4-digit code that opens the door must be made up of these numbers.

What is the worst case number of combinations he must test to try to open this lock using a brute-force attack?

Reference no: EM132152112

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