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A student is given 20 multiple choice questions. Each multiple choice question has 4 options &...

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Basic Math

A student is given 20 multiple choice questions. Each multiplechoice question has 4 options & only one correct answer. Thestudent answers all the questions in a random manner.

a) What is the probability the student scores 80% or above?

b) What is the probability the student scores 50% or above?

Answer & Explanation Solved by verified expert
3.8 Ratings (375 Votes)
Solution Backup Theory Implication of random selection One item is picked selected at random from n items each of n items has equal chance of being selected and hence Pa particular item is selected 1n 1 If X Bn    See Answer
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