GRE / quantitative / General Test

Probability and counting

10 original practice questions. Open them in any order.

Independent preparation material, not an official test or score prediction.

Question 1 of 10 · easier

Multiple-choice — select one answer choice

Select one answer choice.

A bicycle lock opens with a 4-digit code. Each digit is one of the digits 0 through 9, the first digit cannot be 0, and no digit may appear more than once in the code. How many different codes are possible?

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