A five-question quiz is taken in which the first and second questions have four answer choices, the third and fourth questions have three answer choices, and the last question has five answer choices. If a student randomly marks an answer for each question, what is the expected number of questions he will answer correctly?

Students were requested to answer a question at school and to declare what is most important for them to succeed. The one that response stood out from the rest was practice. Successful persons aren’t born successful; they become successful thru hard work and determination. This is how you can fulfill your goals. followed below some question and answer examples that you would probably implement to upgrade your knowledge and gain insight that will assist you to maintain your school studies.

Question:

A five-question quiz is taken in which the first and second questions have four answer choices, the third and fourth questions have three answer choices, and the last question has five answer choices. If a student randomly marks an answer for each question, what is the expected number of questions he will answer correctly?

A. 0.27B. 0.96C. 1.00D. 1.37​

Answer:

The expected number of questions answered correctly in the quiz of five questions is 1.37.

Given that

Q1  has 4 choices

Q2  has 4 choices

Q3 has 3  choices

Q4 has 3  choices

Q5 has 5  choices

Assuming that only one option is correct for  each question

Then the probabilities for choosing correct options for Questions =

 

If a student randomly marks an answer for each question, what is the expected number of questions answered correctly

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They could simply hopefully assist the student answer the question by applying the questions and answer examples. Then would probably carry out some sharing in a group discussion and also study with the classmate in connection with the topic, so another student also take up some enlightenment and still keeps up the school learning.

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