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Study Stuff for MCA Examinations - NIMCET
Study Stuff for MCA Examinations - NIMCET
Previous Year Question (PYQs)
In an objective type examination, 120 objective type questions are there; each with 4 options P, Q, R and S.
A candidate can choose either one of these options or can leave the question unanswered.
How many different ways exist for answering this question paper?
Solution
$\text{Each question has 5 choices (4 options + leave blank).}$
$\text{Total number of ways } = 5 \times 5 \times \cdots \times 5 \text{ (120 times)}$
$= 5^{120}$
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