The number of all possible selections of one or more questions from 10 given questions, each question having one alternative is
The number of all possible selections of one or more questions from 10 given questions, each question having one alternative is
(a) 310 (b) 210 – 1 (c) 310 – 1 (d) 210 (e) None of these
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(c) Since each question can be selected in 3 ways, by selecting it or by selecting its alternative or by rejecting it. Thus, the total number of ways of dealing with 10 given questions is 310 including a way in which we reject all the questions.
Hence, the number of all possible selections is 310 – 1.
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