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.

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 =

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

P (Ans) =

            =

            = 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

answer: do we write it

step-by-step explanation:

b and c

step-by-step explanation: