The number of known people is a common multiple of 6, 4 and 3. In 50, the common multiples of three numbers are 12, 24, 36, 48.

So you are not qualified, and you don't know how many people.

If there are 48 students between 40 and 50, the first prize is 48* 1/6=8, the second prize is 48* 1/4= 12, and the third prize is 48 * 1/3 = 65438+. A ***36 people