Back squat, 1 rep
Shoulder Press, 1 rep
Deadlift, 1 rep
The CrossFit Total is the sum of the best of three attempts at the squat, the press, and the deadlift. All three lifts are done while standing on the floor. They are not technique- dependent to the extent of the Olympic lifts, yet they require technical proficiency beyond mere passing familiarity. They are safe when performed correctly.
The first attempt would be a weight you know you can do for a heavy set of three. The second attempt would be a weight you know without any doubt that you could do for a single, having just done the first attempt. And the third attempt is the weight you want to do, based on your performance on the previous two attempts.
The CrossFit Journal 2006