The numbers 1 through 20 are written on ping pong balls and placed into a bin. One ping pong ball is drawn. Find the probability that you draw an even number or a 3.

Lizette is training for a marathon. at 7: 00 she left her house and ran until 8: 30, then she walked until 11: 30. she covered a total distance of 18 miles. her running speed was six miles per hour faster than her walking speed. find her running and walking speeds in miles per hour.