math
posted by Anonymous .
Of 30 runners surveyed ,23 go running in the morning and 15 go running in the evening . Seven of the runners surveyed go running in both the morning and the evening .How many runners go running in the morning but not the evening?

23  7 = ?
Respond to this Question
Similar Questions

physics
two runners who live 10 miles apart leave home and start running towards each other at the same time. one runner runs 4 miles per hour, and the ohter runs 6 miles per hour. how long after the runners begin running will they meet? 
algebra II
Two runners at opposite ends of a 5 mile bridge begin jogging towards each other. Runner A is running at 5 mph, runner B is running at 4 mph. A mosquito lands on one runner as he starts on the bridge than proceeds to fly back and forth … 
physics
Two runners approaching each other on a straight track have constant speeds as shown, while they are 100m apart. How long will it take for the runners to meet if they maintain their respective speeds? 
physics
Runner A is initially 6.0 km west of a flagpole and is running with a constant velocity of 4.5 km/h due east. Runner B is initially 8.0 km east of the flagpole and is running with a constant velocity of 6.5 km/h due west How much … 
Algebra
Of 30 runners surveyed, 22 go running in the morning and 15 go running in the evening. Seven of the runners surveyed go running in both the morning and the evening. How many runners go running in the morning but not the evening? 
Physics
Distance runners often run around an approximately circular trajectory. However, since some runners are running at a larger radius than others, they must be given an advantage in the beginning so that the race is fair. If the path … 
Science
Which of the following would have less momentum than a 52 kg cheetah running at 10 m/s? 
Statistics
uppose that a category of world class runners are known to run a marathon (26 miles) in an average of 143 minutes with a standard deviation of 12 minutes. Consider 49 of the races. Let X = the average times of the 49 races. (a) Find … 
Math
A total of 45 412 runners participated in the Vancouver Sun Run. Of these runners, 0.85% completed the run in under 40 min. How many runners completed in under 40 mins? 
math
a sprinter runs 100 meters in 11.5 seconds.What is the runners average running rate in meters per second?