DS-Question from paper based test

[pleasant_raj]

After winning 50 percent of the first 20 games it played, Team A won all of the remaining games it played. What was the total number of games that Team A won?
1). Team A played 25 games altogether.
2). Team A won 60 percent of all the games it played.

IMO, answer is A, but OA is D. Can somebody please explain why? Thanks!

[GMAT-HELP]

Stmt 1:
0.5*20 + 5 = 15 games won by team A.
Sufficient

Stmt 2:
0.5*20 + y = 0.6(20+y)
=> 10+y = 12+0.6y
=> 0.4y = 2
=> y = 5
=> Total games won by Team A = 15
Sufficient

answer D.

[MAMA]

Originally Posted by GMAT-HELP

Stmt 1:
0.5*20 + 5 = 15 games won by team A.
Sufficient

Stmt 2:
0.5*20 + y = 0.6(20+y)
=> 10+y = 12+0.6y
=> 0.4y = 2
=> y = 5
=> Total games won by Team A = 15
Sufficient

answer D.

nothing to add. sufficient.