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Amit is going to guess on all 20 questions of his multiple choice test. Each question on the test has 4 answer options, and only one is correct.

What is the best prediction for the number of questions that Amit will answer correctly?

User Petrit
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1 Answer

4 votes

Final answer:

The best prediction for the number of questions Amit will answer correctly on a 20-question multiple choice test with 4 options each is 5.

Step-by-step explanation:

The student in the question, Amit, is guessing on all 20 questions of his multiple choice test where each question has 4 answer options, and there is only one correct answer.

To predict the number of questions he will answer correctly, we calculate the expected value. Since there is a one in four chance of guessing any single question correctly, the expected value is calculated by multiplying the probability of a correct answer by the total number of questions.

The expected value for the number of correct answers is:

  • Expected correct answers = Probability of guessing correctly × Total questions
  • Expected correct answers = 1/4 × 20
  • Expected correct answers = 5

Therefore, the best prediction for the number of questions that Amit will answer correctly is 5.

User Crysxd
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