1.

There are 10 true or false questions in an examination. Then these questions can be answered in (a) 240 ways(b) 120 ways (c) 1024 ways (d) 100 ways

Answer»

(c) 1024 ways

For each question, there are two ways of answering it. 

For 10 questions the numbers of ways to answer 

= 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 

= 210 

= 1024 ways


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