A student is taking a multiple choice exam. There are five possible answers for each question.
What is the probability the student will answer the first question correctly?
What is the probability that the student will answer the first question incorrectly?
assuming the student is totally ignorant of the subject matter, and guesses randomly, the the chance of a correct answer is 1/5.
That makes it easy to tell what the chance is of a wrong answer.
I'm not sure of the second question. I understand the 1/5 chance of answering correctly but I'm not sure of the probability of answering incorrectly. Would it be 1 - 1/5?
To calculate the probability of answering the first question correctly, we need to know the number of possible correct answers and the total number of possible answers.
Given that there are five possible answers for each question, the probability of selecting the correct answer is 1 out of 5.
Therefore, the probability that the student will answer the first question correctly is 1/5 or 0.2.
To calculate the probability of answering the first question incorrectly, we can subtract the probability of answering it correctly from 1.
Since the probability of answering the first question correctly is 0.2, the probability of answering it incorrectly is 1 - 0.2 = 0.8, or 4/5.
To calculate the probability of the student answering the first question correctly, we need to determine the total number of possible outcomes and the number of favorable outcomes.
In this case, there are five possible answers for each question, so the total number of possible outcomes is 5.
As there is only one correct answer, the number of favorable outcomes is 1.
Therefore, the probability of the student answering the first question correctly is 1/5 or 0.2 (20%).
To calculate the probability of the student answering the first question incorrectly, we can subtract the probability of getting it right from 1.
So, the probability of the student answering the first question incorrectly is 1 - 0.2 = 0.8 (80%).