5. In a class of 60 students, the number of
students who passed Biology is 6 more
than the number who passed Chemistry.
Every student passed at least one of the
two subjects and 8 students passed both
subjects
i) How many students passed Biology?
ii) How many students passed
Chemistry?
ii) How many students passed only one
subject?​

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?