Question

An unprepared student guesses all the answers randomly. Find the probability the​ student's first and third answers are correct and his second answer is wrong. The probability of the​ student's answers being CWC is nothing.

Answer 1

Answer:

0.999

Step-by-step explanation:

Assuming that there are ten questions.

This yields:

Each answer has an equal chance of being selected.

Therefore, the probability of the answer = $\frac{1}{2}$

But we assume 10 questions, therefore, the probability will be given as follows:

P (Ans) = $(a^{x})$

            = $(\frac{1}{2}) ^{10}$

            = 0.000977

This is the probability of getting them all wrong.

The probability of getting the answer right is given by p(Right answer) = 1 -0.000977 = 0.9990