In an examination there are three multiple choice questions and e… - Vidyadip

MCQ

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
$27$
✓
$63$

✓

Answer

Correct option: D.

$63$

d
(d) Each question can be answered in $4$ ways and all questions can be answered correctly in only one way, so required number of ways $ = {4^3} - 1 = 63$.

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