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  • In an examination, there are three multiple choice questions and each question has 4 choices. Number of sequences in which a student can fail to get all answers correct is<div class='qna-o

In an examination, there are three multiple choice questions and each question has 4 choices. Number of sequences in which a student can fail to get all answers correct is

Option: 1

11


Option: 2

15


Option: 3

80


Option: 4

63


Answers (1)

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No. of ways of attempting I , II,III questions are 4 each.

Total no.of ways =4 \cdot 4 \cdot 4=64

No.of ways getting all correct answer =1 \cdot 1 \cdot 1=1

\therefore No.of ways of not getting all answers correct =64-1=63

 

Posted by

Ritika Jonwal

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