the probability that a house in an urban area will develop a leak is 4%. If 27 houses are randomly selected, what is the probability that none of the houses will develop a leak? Round to the nearest thousandth.

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.