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प्रश्न
A question paper has 6 questions. How many ways does a student have if he wants to solve at least one question?
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उत्तर
Every question is ‘SOLVED’ or ‘NOT SOLVED’.
There are 6 questions.
Number of outcomes = 26
This number includes the case when the student solves NONE of the questions.
Required number = 26 – 1 = 64 – 1 = 63
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संबंधित प्रश्न
A teacher wants to select the class monitor in a class of 30 boys and 20 girls. In how many ways can he select a student if the monitor can be a boy or a girl?
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