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If an employee of Company A is selected at random for a

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If an employee of Company A is selected at random for a [#permalink] New post   29 Feb 2012, 10:11
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If an employee of Company A is selected at random for a survey, what is the probability that the employee is an executive?

(1) Company A employs 462 people.

(2) The ratio of the number of employees of Company A who are executives to the number of employees of Company A who are not executives is 2:9.
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Re: If an employee of Company A is selected at random for a [#permalink] New post   29 Feb 2012, 10:21
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If an employee of Company A is selected at random for a survey, what is the probability that the employee is an executive?

Question: executive/total=?

(1) Company A employs 462 people. Clearly insufficient.

(2) The ratio of the number of employees of Company A who are executives to the number of employees of Company A who are not executives is 2:9 --> executive/(not executive)=2/9 --> executive/total=2/11, since {total} = {executive}+{not executive}. Sufficient.

Answer: B.
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Re: If an employee of Company A is selected at random for a [#permalink] New post   01 Jul 2012, 23:52
It's B. Since a ratio of this kind gives us the probability. Bunuel works it out best.
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Re: If an employee of Company A is selected at random for a [#permalink] New post   26 May 2020, 21:00
Bunuel wrote:
If an employee of Company A is selected at random for a survey, what is the probability that the employee is an executive?

Question: executive/total=?

(1) Company A employs 462 people. Clearly insufficient.

(2) The ratio of the number of employees of Company A who are executives to the number of employees of Company A who are not executives is 2:9 --> executive/(not executive)=2/9 --> executive/total=2/11, since {total} = {executive}+{not executive}. Sufficient.

Answer: B.


Hi Bunnel,
What if ratio of executive to non-executive is 4:18 which leads to 2:9 we will have two different probabilities right?
Help me
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Re: If an employee of Company A is selected at random for a [#permalink] New post   02 Jun 2020, 02:20
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chandra73 wrote:
Bunuel wrote:
If an employee of Company A is selected at random for a survey, what is the probability that the employee is an executive?

Question: executive/total=?

(1) Company A employs 462 people. Clearly insufficient.

(2) The ratio of the number of employees of Company A who are executives to the number of employees of Company A who are not executives is 2:9 --> executive/(not executive)=2/9 --> executive/total=2/11, since {total} = {executive}+{not executive}. Sufficient.

Answer: B.


Hi Bunnel,
What if ratio of executive to non-executive is 4:18 which leads to 2:9 we will have two different probabilities right?
Help me


Hi chandra73, the ratio is expressed in simplest form, so 4:18 is same as 2:9.
We will have only one probability
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Re: If an employee of Company A is selected at random for a [#permalink]
02 Jun 2020, 02:20
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Bunuel
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