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Before play-offs, a certain team had won 80 percent of its

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Before play-offs, a certain team had won 80 percent of its [#permalink]

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Before play-offs, a certain team had won 80 percent of its games. After play-offs, what percent of all its games had the team won?

(1) The team competed in 4 play-off games.
(2) The team won all of its play-off games.


What is being asked here? Before + After Play-offs ?
[Reveal] Spoiler: OA

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Re: Before play-offs, a certain team had won 80 percent of its [#permalink]

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boomtangboy wrote:
Before play-offs, a certain team had won 80 percent of its games. After play-offs, what percent of all its games had the team won?

(1) The team competed in 4 play-off games.
(2) The team won all of its play-off games.


What is being asked here? Before + After Play-offs ?


The question asks about the percent of the total games that the team won.

For (1)+(2) we have that the team won 80% of games played before play-offs and 100% of 4 games played after. Now, without knowing how many games were played before play-offs we cannot answer the question.

For example if before play-offs the team played 5 games then it won 8 out of 9 games (4 before and 4 after) but if before play-offs the team played 10 games then it won 12 out of 14 games (8 before and 4 after).

Answer: E.
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Re: Before play-offs, a certain team had won 80 percent of its [#permalink]

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New post 23 Apr 2012, 14:19
I get E, neither choice adds value to figure out total win % after playoffs.

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Re: Before play-offs, a certain team had won 80 percent of its [#permalink]

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New post 02 Mar 2017, 10:55
Hello from the GMAT Club BumpBot!

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Re: Before play-offs, a certain team had won 80 percent of its [#permalink]

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New post 10 Sep 2017, 10:52
I couldn't understand the question, and option B. Could anyone please explain?
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DAakash7 wrote:
I couldn't understand the question, and option B. Could anyone please explain?


The team played certain number of games before play-offs plus certain number of games in play-offs. We want to know what percent of all its games had the team won.

(2) says that the team won all of its play-off games.

Check complete solution here: https://gmatclub.com/forum/before-play- ... l#p1071527

Hope it helps.
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Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

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Re: Before play-offs, a certain team had won 80 percent of its [#permalink]

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New post 10 Sep 2017, 23:57
Before play-offs, a certain team had won 80 percent of its games. After play-offs, what percent of all its games had the team won?
Let no. of games before playoff = x
Game wons = 80% of x = 0.8x

(1) The team competed in 4 play-off games.
so total no. of games = x+4. But here we don't know how many games team won. So we cannot calculate % of won games. So Not sufficient

(2) The team won all of its play-off games.
Team won all games. But we don't know how many games are being played. SO we don't know final total number of games. Not sufficient

1+2
Now we know team played 4 more games and won all
So total number of games = x+4
Total games won = 0.8x+4

% of games won = (0.8x +4) /(x+4) *100

Here we cannot solve equation as we don't know x and nothing cancels out. So Not sufficient.

Answer: E

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Re: Before play-offs, a certain team had won 80 percent of its [#permalink]

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New post 11 Sep 2017, 02:53
Bunuel wrote:
DAakash7 wrote:
I couldn't understand the question, and option B. Could anyone please explain?


The team played certain number of games before play-offs plus certain number of games in play-offs. We want to know what percent of all its games had the team won.

(2) says that the team won all of its play-off games.

Check complete solution here: https://gmatclub.com/forum/before-play- ... l#p1071527

Hope it helps.


Thanks a lot for the clarification Bunuel - please accept my Kudos also.
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Re: Before play-offs, a certain team had won 80 percent of its   [#permalink] 11 Sep 2017, 02:53
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