CSUS Find the Probability that The Number of Questions Exam Simple stat 1 paper with 5 questions 1 paper Must Finish asap within 40 mins In-class Assignment 10
Name:______________
(1) A quiz consists of 7 true/false questions. A student guesses randomly at each answer. Find the
probability that the number of questions answered correctly is between 2 and 4, inclusive.
(2) A multiple-choice test has 8 questions. Each question has five possible answers, of
which only one is correct. A student guesses randomly at each answer. Find the
probability that the number of questions answered correctly is less than 2.
(3) In a certain college, 33% of the physics majors belong to ethnic minorities. Ten students are selected
at random from the physics majors.
a) What is the probability that exactly 5 belong to an ethnic minority?
b) What is the probability that at least 1 belong to an ethnic minority?
1
In-class Assignment 10
Name:______________
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