The number of all possible selections of one or more questions from 10 given questions, each question having one alternative is Answers.
A) 3 10 B) 2 10 – 1 C) 3 10 – 1 D) 2 10 E) None of these
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 3 10 – 1.   Answer 3 10 – 1
<result>C</result>
The number of all possible selections of one or more questions from 10 given questions, each question having one alternative is