Looking at the list, we know that the recovery scores of puzzles and Rubik's Cube are the same, so they are all 20 points.

The sum of b and c is 167 and can be listed as follows: 60x%+80y%+80x%+90y% =140x%+170y% =167-20 * 2 =/kloc.

Namely:140 x%+170y% =127.

Because 80 points and above won the prize, the two known competitions scored 20 points, so the right side of the above formula was ranked as 60 points, and we got:

66. 1x%+80.3y%=60

Contrast score:

A: 89 >; 66. 1 86 >80.3, so the score is greater than 80.

B: 60

c:80 & gt； 66. 1 90 >80.3, so the score is greater than 80.

So: A and C won the first prize.