Q36,paper 2,J13 . A test contains 100 true/false questions. How many different ways can a student answer the questions on the test, if the answer may be left blank also.

(A)100P2.

(B) 100C2 .

(C) 2¹⁰⁰

(D) 3^100.

^{Answer D.}

^{Suppose there are100 questions. all have 3 options.}

^{first question can be attempted in 3 way.}

^{second question can have 3 option.}

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^{100th question can have 3 option.}

^{so answer is}  3^100.