Amit is going to guess on all 2 0 2020 questions of his multiplechoice test. Each question on the test has 4 44 answer options, and only one is correct. What i
Question
2
0
2020 questions of his multiplechoice test. Each question on the test has
4
44 answer options, and only one is correct.
What is the best prediction for the number of questions that Amit will answer correctly?
Choose 1 answer:
2 Answer

1. User Answers Hulkk
Answer:
The best prediction for the number of questions that Amit will answer correctly is 5.
Stepbystep explanation:
Each question can be considered as an independent Bernoulli trial. This implies that we have 20 independent trials.
Now, the probability of making a correct guess on each question is;
1/4. This is because we have 4 choices per question and only 1 is correct.
If we now let the random variable X denote the number of questions that Amit will answer correctly, then X is a Binomial random variable with parameters;
20 and 1/4.
The expected number of correct answers is simply the product of these two values;
20 * (1/4) = 5
Therefore, the best prediction for the number of questions that Amit will answer correctly is 5

2. User Answers 88885
Answer:
Close to five but not exactly 5
Stepbystep explanation:
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