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प्रश्न
In how many ways can an examinee answer a set of ten true/false type questions?
उत्तर
Number of ways of answering the first question = 2 (either true or false)
Similarly, each question can be answered in 2 ways.
∴ Total number of ways of answering all the 10 questions = 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 210 = 1024
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