Question

N an objective exam which has 2 answer options each for all the 20 questions.what is the probability that sushant answers all the questions correctly?

Answer 1

If there is 20 ques each have 2 option that there are 40 answer then the probability will be 1/2

Answer 2

The probability of correct answer is 1/2.

Given:

There are 20 questions in total and each question has two options.

To find:

The probability of correct answer.

Solution:

Total number of questions is 20.

Every question has two options as answers.

So there are 20×2 i.e. 40 answers in total.

However,only 20 out of them are correct.

We know,

Probability of an event = Favourable outcomes/ Total outcomes

P= 20/40

=1/2

Hence, The probability that Sushant answers all the questions correctly is 1/2.