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प्रश्न
Answer the following:
A question paper has 6 questions. How many ways does a student have to answer if he wants to solve at least one question?
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उत्तर
Every question is ‘SOLVED’ or ‘NOT SOLVED’
There are 6 question.
Number of outcomes = 26
This number includes the case when the student solves NONE of the question.
Required number = 26 – 1
= 64 – 1
= 63
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