Description
An urn contains 4 blue marbles and 3 red marbles. Miley Cyrus goes to the urn, randomly selects a marble, records the color, and then replaces the marble. She does this an additional 99 times (for a total of 100 recordings). What is the expected number of red marbles recorded?
(Round answers to the third decimal place if needed)
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Explanation & Answer
p(red marble) = 3/7
frequency = 100
Expected number of red marbles recorded = (3/7)(100) = 42.857
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