What is the assigned value of a floor back tuck?

The assigned value of a floor back tuck is 0.60, making the correct choice C. This value reflects the complexity and difficulty of the skill performed on floor exercise, where the gymnast demonstrates a backward somersault takeoff and rotation while keeping their feet tucked. Skill values are determined based on the technical execution and difficulty level, with a back tuck being a foundational skill that is more advanced than simpler skills but less complex than some other elements that involve additional twists or variations.