License Plate Quiz in College Computer Science Principles

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fmohtadi99

8 février 2022 16:50

Students passing College Computer Science Principles might have been passed Quiz 1 in Unit: Digital Information.

In this quiz, there is a question asking about possible count of license plates in a country as a binary format:

HOW MANY UNIQUE LICENSE PLATES ARE THERE IN 7 BITS?

The acceptable answer is 2^7 = 128. But all we know that actually no car can take zero (0000000) as a license plate so the answer must be (2^7) - 1 = 128 - 1 = 127.

Can anyone explain? Am I right?

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Isabella

9 février 2022 06:39
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Well maybe think of it this way, the question states:" How many UNIQUE license plates are there" So basically it's just asking you how many unique number combinations there are as for 7 digits. I don't think it is necessary to put the question into reality. I mean it's just a question...
Isabella

9 février 2022 06:41
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But I think you are right, we should only consider from 0000001 to 9999999 since license plates don't include 0000000

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License Plate Quiz in College Computer Science Principles

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