In a certain test there are \[n\] questions. In the test \[{{2}^{n-i}}\] students gave wrong answers to at least \[i\] questions, where \[i=1,\ 2,\ ......n\]. If the total number of wrong answers given is 2047, then \[n\] is equal to

In a certain test there are \[n\] questions. In the test \[{{2}^{n-i}}

1.	In a certain test there are \[n\] questions. In the test \[{{2}^{n-i}}\] students gave wrong answers to at least \[i\] questions, where \[i=1,\ 2,\ ......n\]. If the total number of wrong answers given is 2047, then \[n\] is equal to
A.	10
B.	11
C.	12
D.	13
Answer» C. 12

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In a certain test there are \[n\] questions. In the test \[{{2}^{n-i}}\] students gave wrong answers to at least \[i\] questions, where \[i=1,\ 2,\ ......n\]. If the total number of wrong answers given is 2047, then \[n\] is equal to

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