Write the phrase "nineteen less than the quotient of a number and fifteen" as a mathematical expression. a. x⁄15 + 19 b. x⁄15 – 19 c. 15⁄x – 19 d. x⁄19 – 15

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You were told that the amount of time lapsed between consecutive trades on the new york stock exchange followed a normal distribution with a mean of 15 seconds. you were also told that the probability that the time lapsed between two consecutive trades to fall between 16 to 17 seconds was 13%. the probability that the time lapsed between two consecutive trades would fall below 13 seconds was 7%. what is the probability that the time lapsed between two consecutive trades will be between 14 and 15 seconds?