1.2 times

In this way, the gap between each male player and the average score is 1.5, which needs the scores of female players to make up. And each female player's score is 3 points higher than the average score, which means that 1 female player can make two male players reach the average score. So there are twice as many male players as female players.

The purpose of the equation is to assume that there are x male players and y female players, and get 88.5X+93Y/X+Y=90, and the solution is X=2Y.

So there are twice as many male players as female players.

2. If the average grade of class A is X and the average grade of class B is X+7, the equation 51x+49 (x+7)/100 = 81can be obtained.

If X=77.57 is solved, then the average of class B is 84.57.