The probability of guessing right on a 4-option multiple choice item is 1/4 or 0.25. If a quiz has 10 questions. Determine the: mean = (exact answer, no rounding) variance = (exact answer, no rou

The probability of guessing right on a 4-option multiple choice item is 1/4 or 0.25. If a quiz has 10 questions. Determine the: mean = (exact answer, no rounding) variance = (exact answer, no rou

The probability of guessing right on a 4-option multiple choice item is 1/4 or 0.25. If a quiz has 10 questions. Determine the:

mean =     (exact answer, no rounding)

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variance =  (exact answer, no rounding)

standard deviation =  (round to one decimal place)