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prob and stats

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A coin is weighted so that the probability of obtaining a head in a single toss is 0.37. If the coin is tossed 27 times, find the following probabilities. Round your standard normal variable to two decimal places before using the table of values. (Give your answers to four decimal places.)
(a) more than 12 heads


(b) between 12 and 15 heads, inclusive


(c) less than 10 heads

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