Destiny’s Child’s final lineup had three members.
The final lineup consisted of Beyoncé Knowles, Kelly Rowland, and Michelle Williams. The trio became the group’s best-known configuration and recorded the albums Survivor, 8 Days of Christmas, and Destiny Fulfilled.
Destiny’s Child originally had more members. The early group developed from Girl’s Tyme and included performers such as LaTavia Roberson and LeToya Luckett. After lineup changes, the group continued as a quartet before Farrah Franklin’s departure and eventually became the three-member act most audiences recognize.
The group announced a temporary split in 2002, but the three members reunited for Destiny Fulfilled, released in 2004. They announced their final disbandment in 2005, although they have appeared together for selected performances since then. The answer refers to the final official lineup, not the number of people who belonged to the group across its entire history.