Cora Edith Dean, 46, and her daughter, Carolyn Elaine Dean, 17, residents of Potomac who had lived in this area for the past seven years, died in Braxton County Memorial Hospital in West Virginia as a result of injuries they received in an auto accident on Aug. 3.

A spokesman for the Braxton County police said the two women, and two other relatives, were traveling on I-79 near Sutton, W.Va., when one of the tires of their car blew out and the car went out of control. The two women were taken to the hospital, where Mrs. Dean died on Aug. 4 and her daughter a day later.

They were driving to Oklahoma to visit relatives when the accident occurred.

Mrs. Dean was a native of Tulsa, and attended the University of Arkansas and Oklahoma State University. She was a member of the Fourth Presbyterian Church Church in Bethesda, where she taught Sunday School. She also had been active in the Campus Crusade for Christ.

Miss Dean also was a native of Tulsa and a member of the Fourth Presbyterian Church. She had finished her junior year at Winston Churchill High School.

Mrs. Dean's survivors include her husband, Donald, of Potomac; four sons, Clifford, of Arlington, and Cris, David, and Douglas, all of Potomac; another daughter, Deborah Dean of Potomac; her parents, Mr. and Mrs. A.M. Hicks, and a sister, Barbara Norman, all of Tulsa.

In addition to her father, four brothers, sister, and maternal grandparents, Miss Dean's survivors include her paternal grandparents, Mr. and Mrs. H.C. Dean of Little Rock.