X = (7 * 7 *10+7 * 9 *10+7 * 8)/56+1/,and y wins the prize; 20; 7*y=( 1/, then the calculation is y/72+ 1/20.

Therefore, the number of award-winning students accounts for1/3 *1/x of the total parameters; 7* 1/7*y

That is 6/16+1/(6 * 8 * 9 *10) =1/.

According to the meaning of the question; (6 * 7 * 8 * 9 * 10)=(3 * 8 * 9)/:y =( 1/24+2/:y/90)x

After simplification; 5 *118) x+1/Suppose there are x people in the math contest.