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There are 10 questions in a question paper. In how many ways, a student can solve there questions, if he solves one or more question?

1024
1025
1023
1000

Correct Answer: 1023

Explanation:

Required number of ways
= 2ⁿ - 1 = 2¹⁰ - 1 = 1024 - 1 = 1023

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