Solve for x:
possible answers:
{7 + 3i, 7 - 3i}
{3 + 7i, 3 - 7i}
{2 + 19i, 2 - 19i}
{2 + 9i, 2 - 9i}

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?