Math  /  Discrete

QuestionNicola is setting a 4-digit passcode on her phone. Digits can appear more than once in the passcode, and to unlock Nicola's phone the digits will need to be entered in the correct order.
How many possible passcodes could Nicola set where the first digit is 7 ?

Studdy Solution
There are **1000** possible passcodes Nicola can set with the first digit being 7.

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