GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 19 Mar 2019, 12:08

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# On a soccer team, one team member is selected at random to be the goal

Author Message
TAGS:

### Hide Tags

Senior Manager
Joined: 02 Jan 2017
Posts: 307
On a soccer team, one team member is selected at random to be the goal  [#permalink]

### Show Tags

01 Mar 2017, 06:29
4
00:00

Difficulty:

35% (medium)

Question Stats:

64% (01:07) correct 36% (01:16) wrong based on 132 sessions

### HideShow timer Statistics

On a soccer team, one team member is selected at random to be the goalie. What is the probability that a substitute player will be the goalie?

(1) One-sixth of the team members are substitute players.

(2) 18 of the team members are not substitute players.
Magoosh GMAT Instructor
Joined: 28 Dec 2011
Posts: 4486
On a soccer team, one team member is selected at random to be the goal  [#permalink]

### Show Tags

01 Mar 2017, 17:13
1
2
vikasp99 wrote:
On a soccer team, one team member is selected at random to be the goalie. What is the probability that a substitute player will be the goalie?

(1) One-sixth of the team members are substitute players.

(2) 18 of the team members are not substitute players.

Dear vikasp99,

I'm happy to help.

It's helpful to think in terms of two different "baskets" of information. One is "ratio" information, which includes fractions, percents, and probabilities--1/2 the group, 30% of the group, or the ratio of A to B in the group is 4:7. All of that is the same kind of information: we don't know the exact counts or numbers, and we can figure out anything else in the basket without knowing the counts.

The other is "counts" information, the actual number of individuals in categories. One count tells us nothing about the ratio information, but if we have single count + ratio information, we generally can figure out all the counts.

The prompt is asking for a probability.

Statement #1 give us a fraction, which is ratio information. This is the same basket as the prompt, so we can figure out the probability = 1/6. Sufficient.

Statement #2 gives us a single count, and we have no ratio information, so we can't figure out anything. Not sufficient.

Does all this make sense?
Mike
_________________

Mike McGarry
Magoosh Test Prep

Education is not the filling of a pail, but the lighting of a fire. — William Butler Yeats (1865 – 1939)

Intern
Joined: 17 Sep 2016
Posts: 42
GMAT 1: 640 Q44 V35
Re: On a soccer team, one team member is selected at random to be the goal  [#permalink]

### Show Tags

07 Mar 2017, 04:01
mikemcgarry wrote:
vikasp99 wrote:
On a soccer team, one team member is selected at random to be the goalie. What is the probability that a substitute player will be the goalie?

(1) One-sixth of the team members are substitute players.

(2) 18 of the team members are not substitute players.

Dear vikasp99,

I'm happy to help.

It's helpful to think in terms of two different "baskets" of information. One is "ratio" information, which includes fractions, percents, and probabilities--1/2 the group, 30% of the group, or the ratio of A to B in the group is 4:7. All of that is the same kind of information: we don't know the exact counts or numbers, and we can figure out anything else in the basket without knowing the counts.
The other is "counts" information, the actual number of individuals in categories. One count tells us nothing about the ratio information, but if we have single count + ratio information, we generally can figure out all the counts.

The prompt is asking for a probability.

Statement #1 give us a fraction, which is ratio information. This is the same basket as the prompt, so we can figure out the probability = 1/6. Sufficient.

Statement #2 gives us a single count, and we have no ratio information, so we can't figure out anything. Not sufficient.

Does all this make sense?
Mike

Can you further elaborate this explanation with example Mike ?
Magoosh GMAT Instructor
Joined: 28 Dec 2011
Posts: 4486
Re: On a soccer team, one team member is selected at random to be the goal  [#permalink]

### Show Tags

07 Mar 2017, 11:49
1
akhiparth wrote:
Can you further elaborate this explanation with example Mike ?

Dear akhiparth

I'm happy to respond.

My friend, I am going to chide you. What you asked in not a high quality question. You simply indicated that you need help without explaining anything about what you understand, what you don't understand, etc. Think about how much time & effort it took you to write that question--it probably wasn't a lot. Low effort = low reward. An excellent question is one that involves deep thought and reflection. See this blog:

I will say that I meant to include a link in my original post. I went back an edited the post to include this link:
GMAT Quantitative: Ratio and Proportions

Here's my challenge to you. Read the blog on asking excellent question. Then, read the post on ratios and proportions. Come back here and study what I said above. If you still have questions at that point, I challenge to write the highest quality question about what I have said---include exactly what you understand, exactly which parts confuse you, and exactly the kind of clarification you would need to help you. Ask that excellent question, and I will be happy to answer it.

Does all this make sense?
Mike
_________________

Mike McGarry
Magoosh Test Prep

Education is not the filling of a pail, but the lighting of a fire. — William Butler Yeats (1865 – 1939)

Non-Human User
Joined: 09 Sep 2013
Posts: 10141
Re: On a soccer team, one team member is selected at random to be the goal  [#permalink]

### Show Tags

24 Mar 2018, 11:08
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________
Re: On a soccer team, one team member is selected at random to be the goal   [#permalink] 24 Mar 2018, 11:08
Display posts from previous: Sort by