You Were Told That the Amount of Time Lapsed Between

Essay

You were told that the amount of time lapsed between consecutive trades on a foreign stock
exchange market 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%.The probability is 20% that the time lapsed will be shorter how
many seconds?