UPSC 2006: In a question paper, there are four multiple-choice questions. Each question has five choices with only one choice for its correct answer. What is the total number of ways in which a candidate will not get all the four answers correct?

The correct answer is option (c): 624. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.

This question was asked in UPSC CSE Prelims 2006, GS Paper 1, as Question 92. It falls under Science & Technology > Quantitative Aptitude.

This question is rated "easy". It tests basic recall and most well-prepared aspirants should answer it correctly.

UPSC has asked 164 questions from Quantitative Aptitude (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.