Mr. Martin is giving a math test next period. The test, which is worth 100 points, has 35 problems. Each pro
worth either 5 points or 2 points. How can you set up a system of equations to find how many problems of
value are on the test?
Let x = the number of questions worth 5 points.
Let y = the number of questions worth 2 points.

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?