Out of the 28 girls who tried out for the lacrosse team, 12 were selected. Out of the 35 boys who tried out, 15 were selected.
What is the simplifed ratio for
the 12 of girls who made the team to the 28of girls who tried out?
13
What is the simplifed ratio for
the 15 of boys who made the team to the 28 of boys who tried out?
Are those ratios equivalent?

An automated water dispenser fills packets with one liter of water on average, with a standard deviation of 5 milliliter. the manual says that after a year of operation the dispenser should be tested to see if it needs recalibration. a year later a number of filled packets are set aside and measured separately. it is found that the average packet now contains about 0.995 liters. does the dispenser need calibration? explain your answer.