In a question paper, there are four multiple choice type questions, each question has five choices with only one choice for it’s correct answer. What is the total number of ways in which a candidate will not get all the four answers correct?

Permutations and Combinations 08/12/2020

A. 19
B. 120
C. 624
D. 1024

Explanation:

Multiple choice type questions = 1 2 3 4

Total number of ways = 5x5x5x5 =625.

A number of correct answer = 1.

Number of false answers = 625-1 =624.

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