Question

In an examination there are three multiple choice questions and each question has 4 choices. Number of ways in which a student can fail to get all answer correct is A. 11 B. 12 C. 27 D. 63​

Answer 1

Step-by-step explanation:

There are 4 choices for each question. So, there

are 4 ways to answer a question.

Number of ways to answer 3 questions

=4×4×4

      ↓     ↓     ↓

1st question 2nd  3rd

=64

Out of 64 ways there is only one way which has

all the answers correct. 

So, Number of ways in which a student can fail to get all answers

correct =64−1

             =63