Question

In a science class, 13.5% of the students have earned an A. If 3 students are chosen at random, what is the probability of choosing at least one student who has an A in the science class? Give your answer rounded to the nearest thousandth.

Answer 1

Answer:To introduce her class to binomial distributions, Mrs. Desai gives a

-item, multiple-choice quiz. The catch is, that students must simply guess an answer (A through E) for each question. Mrs. Desai uses her computer's random number generator to produce the answer key so that each possible answer has an equal chance to be chosen. Patti is one of the students in this class.

Let

the number of Patti's correct guesses.

To get a passing score on the quiz, a student must guess correctly at least

times. Would you be surprised if Patti earned a passing score? Compute an appropriate probability to support your answer.

Explanation: