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There are 2 kinds of staff members in a certain company, PART TIME AND

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New post 10 Jul 2011, 20:35
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There are 2 kinds of staff members in a certain company, PART TIME AND FULL TIME. 25 percent of the total members are PART TIME members others are FULL TIME members. The work time of part time members is 3/5 of the full time members. Wage per hour is same. What is the ratio of total wage of part time members to total wage of all members.

A.1/4
B.1/5
C 1/6
D 1/7
E 1/8
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New post 10 Jul 2011, 23:11
Alchemist1320 wrote:
There are 2 kinds of staff members in a certain company, PART TIME AND FULL TIME. 25 percent of the total members are PART TIME members others are FULL TIME members. The work time of part time members is 3/5 of the full time members. Wage per hour is same. What is the ratio of total wage of part time members to total wage of all members.

A.1/4
B.1/5
C 1/6
D 1/7
E 1/8


Just plug in
Assuming there are 100 employees

25% are PT = 25
75% FT = 75

Assume that the total number of hrs FT employees have to work = 10
PT will work = 3/5*10 = 6

since the wages are same , there will no affect on ratios
total number of hrs FT employees work = 75*10 = 750
PT = 25*6 = 150

now the ratio is 150/900 = 1/6
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New post 02 Aug 2015, 11:55
25 PT & 75 FT

Total time taken by PT members for their work - 3
Total time taken by FT members for their work - 5

Wages were all same for both.

Total wages for PT members - 3*25 = 75
Total wages for FT members - 5*75 = 375

Ratio of total wages of part time members to Total wage of all members = 75:(75+375) = 1:6
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Re: There are 2 kinds of staff members in a certain company, PART TIME AND [#permalink]

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New post 09 Jan 2016, 12:10
i tried to pick numbers rather than dive into algebra...
suppose we have total 20 workers: 5 workers part time, 15 workers full time.
suppose full time work 10 hours, part time 6 hours.
suppose pay is 1$/hour
we then have: 5*6*1=30$ - pay for part time workers
and we have: 15*10*1=150$ - pay for full time workers.

total pay - 150+30=180$.

now, we need to have the ratio of pay for part time to total pay
30/180=1/6.
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New post 16 Jan 2016, 17:43
let 1 and 3=number of part time and full time workers respectively
let 3 and 5=number of hours per part time and full time worker respectively
(1)(3)=3 total part time worker hours
(3)(5)=15 total full time worker hours
3+15=18 total worker hours
assuming equal hourly pay, total wage ratio=3/18=1/6
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New post 18 Jan 2016, 11:53
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Hi All,

This question is a 'lift' of an OG question:

GMAT2016: Problem Solving #175, page 177
OG13/GMAT2015: Problem Solving #151, page 173

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Rich
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Re: There are 2 kinds of staff members in a certain company, PART TIME AND   [#permalink] 18 Jan 2016, 11:53
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