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What percent of the drama club members enrolled at a certain

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What percent of the drama club members enrolled at a certain [#permalink]

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What percent of the drama club members enrolled at a certain school are female students?

(1) Of the female students enrolled at the school, 40 percent are members of the drama club.
(2) Of the male students enrolled at the school, 25 percent are members of the drama club.

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New post 20 Aug 2012, 03:16
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SOLUTION

What percent of the drama club members enrolled at a certain school are female students?

(1) Of the female students enrolled at the school, 40 percent are members of the drama club. 0.4F are members of the drama club. Not sufficient.

(2) Of the male students enrolled at the school, 25 percent are members of the drama club. 0.25M are members of the drama club. Not sufficient.

(1)+(2) We need to find the vale of \(\frac{0.4F}{0.4F+0.25M}\), which, as we can see, cannot be determined with the information provided.

Answer: E.
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Re: What percent of the drama club members enrolled at a certain [#permalink]

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New post 22 Aug 2012, 05:35
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Tricky one. Level 650.

Stmt 1: Tells us about the percentage of female in drama club but does not talk about specific numbers. Not sufficient.
Stmt 2: Tells us about the percentage of male in drama club but does not talk about specific numbers. Not sufficient.

Together also no additional information is provided. Depending on absolute numbers of female or male students, the percentage of female students at drama club will vary.

Answer: E

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Re: What percent of the drama club members enrolled at a certain [#permalink]

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New post 24 Aug 2012, 06:47
SOLUTION

What percent of the drama club members enrolled at a certain school are female students?

(1) Of the female students enrolled at the school, 40 percent are members of the drama club. 0.4F are members of the drama club. Not sufficient.

(2) Of the male students enrolled at the school, 25 percent are members of the drama club. 0.25M are members of the drama club. Not sufficient.

(1)+(2) We need to find the vale of \(\frac{0.4F}{0.4F+0.25M}\), which, as we can see, cannot be determined with the information provided.

Answer: E.
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Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

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New post 16 Nov 2013, 12:10
Not sure about a 650 level. More like 550.

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Re: What percent of the drama club members enrolled at a certain [#permalink]

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New post 16 Nov 2013, 12:13
Not sure about a 650 level. More like 550. Almost 80% answered correctly. I would assume something in the 650 range would have around a 50% success rate.

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An easy way to solve the problem is to set up a double set matrix. In our matrix we have two main categories: gender and drama club status. More specifically our table will be labeled with:

1) Percent of males (Males)

2) Percent of females (Females)

3) Percent of people enrolled in the drama club (Drama)

4) Percent of people not enrolled in the drama club (No Drama)

(To save room on our table headings we will use the abbreviations for the categories.)

Since we are asked “what percent” of the drama club members enrolled at a certain school are female students, we can use the convenient number 100 as the total number of people in the school.

Thus, we know:

Total people = 100

Let’s fill all the information into a table.

Image

Now we can move on to the statements.

Statement One Alone:

Of the female students enrolled at the school, 40 percent are members of the drama club.

Since we do not know the number of female students, we can let the number of females equal f. We can thus express the number of female students in the drama club as 0.4f.

Let’s fill the information into the table.

Image


The information provided is not enough to determine what percent of the drama club members enrolled at a certain school are female students. Statement one alone is not sufficient. Eliminate answer choices A and D.

Statement Two Alone:

Of the male students enrolled at the school, 25 percent are members of the drama club.

Since we do not know the number of male students, we can let the number of males in the school equal m. Thus, we can express the number of male students in the drama club as 0.25m.

Let’s fill the information into the table.

Image

The information provided is not enough to determine what percent of the drama club members enrolled at a certain school are male students. Eliminate answer choice B.

Statements One and Two Together:

We know the following:

Image

We see that from the information in the table we do not have the ability to determine the value of f or m; thus, we can’t determine the percentage of the students in the drama club who are female students.

The answer is E.
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Re: What percent of the drama club members enrolled at a certain   [#permalink] 25 Aug 2016, 15:56
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