Find the probability of the following: **(use 4 decimal places)** a.) The probability that one student chosen at random scores above an 78. ________ b.) The probability that 20 students chosen at random have a mean score above an 78. _________ c.) The probability that one student chosen at random scores between a 68 and an 78. __________ d.) The probability that 20 students chosen at random have a mean score between a 68 and an 78. __________

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