P(boy) is asking for the probability that a boy will be chosen to read a poem out loud. Since there are 15 boys, we can get the probability by dividing this with the total number of students. This is because out of all the students, there is an equal possibility that each of the 15 boys will be chosen.
ANSWER: The probability that a boy is selected is 0.5357 or 53.57%
Michelle skated a total of 160 meters because the track is circular and to get the total measurement you have find the diameter of the circular track which is just radius times 2, leaving you with 180.