# Thread: 2 Gmat prep quest.

1. Good post? |

## 2 Gmat prep quest.

Question 1.
At a certain company, the average (arithmentic mean) number of years of experienceeis 9.8years for male employees and 9.1 years for the female employees. What is the ratio of the number of the company’s male employees to the number of the company’s female employees.
1. there are 52 male employee at the moment.
2. The average number of years of experience for the company’s male and female employees combined is 9.3 years.
Question 2.
The sum of the integers in list S is the same as the number of integers in list T. Does S contains more integers than T ?
1. The average (AM) of the integers in S is less than the average of the integers in T.
2. The median of the integers in s is greater then the median of the integers in T.

2. Good post? |
Ans for 1 Quest.

Statement 2 is sufficient so ans B

Say avg exp of males = x => x = 9.8
Avg exp of females = y => y = 9.1
and say no of males = m & no of females = f

From stmt 1 => we dont hv info about no of females so insufficient

From Stmt 2 => ( x*m + y*f ) / ( m + f) = 9.3
so 9.8*m + 9.1*f = 9.3 ( m + f)

we can get m/f from this so sufficient

3. Good post? |
Q 1) as explained by gaurav_inf
Q 2) Stmt 1:
Avg(S) < Avg(T)
=> Avg*number of elements = Sum
=> n(s) > n(T) as Sum is equal and avg(S) is less
Sufficient

Stmt 2:
Insufficient as median is just the middle element but there is no other info on number of elements

Ans A.

4. Good post? |
I think the question stem is saying that Sum(s) = Num(t) and
NOT Sum(s)=Sum(t)

So
if we consider this scenario for question 2.
Set S having Sum 25 and number of integers = 5
Set T having Sum 126 and number of intergers = 25

Avg (s) =5
Avg (t) >5

Another case where Sum(s) = 7
And No of integers in S =7
So Avg(s) =1

And Sum(t) =14
and Number of integers in t =7
Avg (t) = 2

Here the number of integers is the same so A should be insufficient ? So the answer should be E !
Where am i going wrong here ?

5. Good post? |
i solved it (the 2nd question) the same way as GMAT help.

I understand what you're saying about the wording of the question, and I had the same thought as that interpretation.

I believe the question wanted to say SUM"t" = SUM"s"

What does the Official Answer say?

We should be more careful in transcribing questions.

6. Good post? |
Originally Posted by Ketrin1
Question 2.
The sum of the integers in list S is the same as the number of integers in list T. Does S contains more integers than T ?

1 The average (AM) of the integers in S is less than the average of the integers in T.

2 The median of the integers in s is greater then the median of the integers in T.
Statement 1
case 1
if S=-1,0,1,2 => avgS=0,5
if T=2,4 => avgT=3
avgS<avgT, sumS=2= no of elements of T
no of elements S > no of elements of T

case 2
if S=1,2,3,4 => avgS=2,5
if T=1,2,3,4,5,6,7,8,9,10 => avgT=5.5
avgS<avgT, sumS=10= no of elements of T
no of elements S < no of elements of T

insuff

is the wording of the question ok and what is Official Answer, please?

##### Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

#### Posting Permissions

• You may not post new threads
• You may not post replies
• You may not post attachments
• You may not edit your posts
•

SEO by vBSEO ©2010, Crawlability, Inc.