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# A college has two departments, finance dept. and accounting

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Senior Manager
Joined: 10 Dec 2004
Posts: 273
A college has two departments, finance dept. and accounting [#permalink]

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10 May 2005, 20:34
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A college has two departments, finance dept. and accounting dept. The ratio of the teachers in two dept. is 2:1. What is the ratio of the teachers doing a part-time job to the teachers not doing part-time job?

1) 60 teachers of the accounting dept. do part-time jobs.
2) The ratio of the teachers doing part-time jobs in two departments is 3:4
VP
Joined: 13 Jun 2004
Posts: 1115
Location: London, UK
Schools: Tuck'08

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11 May 2005, 02:26
2) The ratio of the teachers doing part-time jobs in two departments is 3:4

what's the meaning ? it is really unclear...
Senior Manager
Joined: 15 Mar 2005
Posts: 418
Location: Phoenix

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11 May 2005, 03:22
For the answer, we need total number of teachers and total number of teachers in part time jobs.

A. 60 in accounting do part time jobs. No idea abt total and teachers doing part time jobs in finance dept. Insufficient.

B. Ratio of teachers doing part time jobs in the two departments is 3:4. Doesn't give us the idea about the total number of teachers. Insufficient.

Combining A and B,
60 do part time jobs in accounting dept, and 45 do in finance.
Total 105 do part time jobs.

But we don't know the total number of teachers (just know the ratio of teachers in the depts - had we known the no of teachers in either one, we could have solved). Thus insufficient.

Therefore, E.
_________________

Who says elephants can't dance?

Re: DS-ratio   [#permalink] 11 May 2005, 03:22
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