Mathematics, 14.04.2020 23:08, davelopez979

A true/false test consists of 25 questions. A student knows the correct answer to 10 of the questions. She guesses each of the other answers independently based on the toss of a coin. a) Find the expectation of the number of correct answers.

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A true/false test consists of 25 questions. A student knows the correct answer to 10 of the question...