Richard T. "Ted" Hosking, formerly of Wilmette, died March 29 at Henrotin Hospital, Chicago. He was 69. Born in Saginaw, Mich., Mr.Hosking lived in Wilmette, Glenview and Northbrook before moving to Chicago. HE served on the committee for last year's 50th reunion of his New Trier High School class. Mr. Hosking was a manufacturer's representative and a member of a barbershop quartet. He was also a member of St. Giles Church in Northbrook. He is survived by his wife, Margaret; two sons, John of San Jose, California, and Charles of Albuquerque, N.M.; and a brother, Paul, of Miami, Florida. A prayer service was conducted March 31 at the LaSalle St. Church in Chicago.