The head electrician has come to you for a devious on the on the lighting fixtures. In a square area that measures 10 m on a side. He wants to illuminate as much of the area as he possibly can using a circular lighting system

Many newspapers carry a certain puzzle in which the reader must unscramble letters to form words. how many ways can the letters of emdangl be arranged? identify the correct unscrambling, then determine the probability of getting that result by randomly selecting one arrangement of the given letters.