Question
Question: In an examination there are three multiple choice questions and each question has 4 choices. Number ...
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 answers correct, is
A
11
B
12
C
27
D
63
Answer
63
Explanation
Solution
Each question can be answered in 4 ways and all questions can be answered correctly in only one way. So required number of ways = 43 – 1 = 63.