NIMCET 2008 Question Paper with solutions

Question : 90 of 120

Marks: +1, -0

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 wavs exist for answering this question paper?

$5^{120}$
$4^{120}$
$120^5$
$120^4$

Validate

Solution:

Each question has 5 options, as it can be answered as A, B, C. D or left also.
Now, all 120 questions will have 5 independent options.
Hence, total number of required ways

=5 × 5 × 5 . . . × 5(120

times

)=5^{120}

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