A box contains 5plain pencils and 7pens. A second box contains 3 color pencils and 3 crayons. One item from each box is chosen at random. What is the probability that a pen from the first box and a crayon from the second box are selected?Write your answer as a fraction in simplest form.
The 6 participants in a200-meter dash had the following finishing times (in seconds):27,25,32,30,32,28
Assuming that these times constitute an entire population, find the standard deviation of the population. Round your answer to at least two decimal places.