Mathematics, 27.05.2021 21:00 KATE1223

Ralphie is taking a ten-question multiple choice test. Each question has five choices. If Ralphie answers a question correctly, he earns one point; if he answers incorrectly, he loses half a point. Ralphie answers the first six questions
correctly, then guesses on the last four. What is the expected value of his test score? Round the answer to the nearest
whole percent.
A 52%
B. 60%
C. 68%
D. 80%

Answers: 3

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