The table below shows the amount of money it costs sarah to perform her craft demonstration based on how much material is
required for each attendee.
number of people attending
5
cost
$15
$18
$20
$25
15
sarah spends a total of $60. based on the information in the table, how many people attended the craft demonstration?

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?