A question paper has $5$ questions. Each question has an alternative. The number of ways in which a student can attempt atleast one question is.

2^{5} - 1

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3^{5} - 1

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3^{4} - 1

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2^{4} - 1

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Solution

The correct option is A $2^{5} - 1$
a student can answer each question in 2 ways.
sp total ways are $2^{5}$ .
and to attempt at least one is $2^{5} - 1$

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A question paper has 5 questions. Each question has an alternative. The number of ways in which a student can attempt atleast one question is.

The correct option is A 25−1a student can answer each question in 2 ways. sp total ways are 25.and to attempt at least one is 25−1

A question paper has $5$ questions. Each question has an alternative. The number of ways in which a student can attempt atleast one question is.

The correct option is A $2^{5} - 1$
a student can answer each question in 2 ways.
sp total ways are $2^{5}$ .
and to attempt at least one is $2^{5} - 1$