How many 16-digit binary strings contain exactly seven I's? (Examples of such 0111000011110000 and 0011001100110010, etc.) strings include

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Q: So what is the answer here!

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Q: In 1-4 justify your answers by using the definitions of even, odd, prime, and composite numbers. 1.…

A: We use the definitions to answer these questions. See step 2 for details.