Irene Flack, 69, a retired chief baker at Wakefield High School in Arlington and the mother of singer Roberta Flack, died of cancer Saturday at her home in Alexandria.

Mrs. Flack, who was born in Weaverville, N.C., moved to the Washington area in the early 1940's. She began working at Wakefield in the min-1950s and retired in 1971.

She was a member of the Lomax Ame Zion Church in Arlington. She was the organist and organist of the SeniorChior there, the organist and director of Youth Choir, and a member of the Missionary and Stewardess boards and of the Church Women United. She also was in charge of the church's Women's Day activities.

Her husband, Laron, died in 1959.

In addition to Roberta Flack of New York City, survivors include one son, Leroy Flack of Oxon Hill; two other daughters, LaRene Flack of Oxen Hill, and Ingrid Flack-Myers of Atlanta; one sister, Della Baird of New York City; two brothers, Gilbert and Pindar Council, both of Arlington, and five grandchildren.

The family suggests that expressions of sympathy be in the form of contributions to the Lomax AME ZionBuilding Fund, 2706 S. 24th Rd., Arlington.