Use the following information to answer the question. Bellei Extravecchio Balsamico Tradizionale is a very expensive brand of balsamic vinegar. A twelve ounce bottle typically costs two- hundred dollars or more. In a blind taste test, a group of food experts tasted three premium balsamic vinegars, with the most expensive one being Bellei Extravecchio Balsamico Tradizionale. When asked to pick the most expensive balsamic vinegar, 92 got it right and 76 got it wrong.
-If this group were just guessing, how many people (out of 168)would be expected to guess correctly?
A)Not enough information given to calculate expected value.
B)84
C)70
D)56

Question

Quizplus · Accepted Answer

If the group were just guessing, each person would have a 1 in 3 chance of picking the correct vinegar. Therefore, the expected number of correct guesses is 1/3 of 168, which is 56.

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