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  • A question paper has 6 question. Each question has 2 parts in it and he has to solve only one of them. Then the number of ways in which a student can attempt the paper, so that he solves at le

A question paper has 6 question. Each question has 2 parts in it and he has to solve only one of them. Then the number of ways in which a student can attempt the paper, so that he solves at least one question, is 

Option: 1

729 


Option: 2

728 


Option: 3

18 


Option: 4

17 


Answers (1)

best_answer

For any of the question, student can attempt first part or second part or leave the question unattempted

So 3 options for each question

So, total options are 36

But, in one of these ways, he will not attempt any question, so that has to be removed from total

So, Number of ways = 3 ^6 -1 = 728

 

Posted by

Sayak

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