Crack CRs !!!

[Dream_GMAT]

1-People with serious financial problems are so worried about money that they cannot be happy. Their misery makes everyone close to them—family, friends, colleagues—unhappy as well. Only if their financial problems are solved can they and those around them be happy.
Which one of the following statements can be properly inferred from the passage?
(A) Only serious problems make people unhappy.
(B) People who solve their serious financial problems will be happy.
(C) People who do not have serious financial problems will be happy.
(D) If people are unhappy, they have serious financial problems.
(E) If people are happy, they do not have serious financial problems.

2-Photovoltaic power plants produce electricity from sunlight. As a result of astonishing recent technological advances, the cost of producing electric power at photovoltaic power plants, allowing for both construction and operating costs, is one-tenth of what it was 20 years ago, whereas the corresponding cost for traditional plants, which burn fossil fuels, has increased. Thus, photovoltaic power plants offer a less expensive approach to meeting demand for electricity than do traditional power plants.
The conclusion of the argument is properly drawn if which one of the following is assumed?
(A) The cost of producing electric power at traditional plants has increased over the past 20 years.
(B) Twenty years ago, traditional power plants were producing 10 times more electric power than were photovoltaic plants.
(C) None of the recent technological advances in producing electric power at photovoltaic plants can be applied to producing power at traditional plants.
(D) Twenty years ago, the cost of producing electric power at photovoltaic plants was less than 20 times the cost of producing power at traditional plants.
(E) The cost of producing electric power at photovoltaic plants is expected to decrease further, while the cost of producing power at traditional plants is not expected to decrease.

OAs will follow the discussions :-)

[MCapri]

IMO B and E.can explain if the answer matches the OA

[Dream_GMAT]

No dude OAs do not match....some more efforts !!!

[Dream_GMAT]

Experts..your comments please

[vinnie]

the answer is e and c if correct will discus else give the write answers good question bro

[CACERJ01]

Hi guys,

These questions are good. Thanks Dream_GMAT. They made me think a lot. My answers are E and C. Here is my reasoning:

Q1 - Which one of the following statements can be properly inferred from the passage?
(A) Only serious problems make people unhappy. => Too broad. The passage only talks about the relation financial problems and unhappiness.
(B) People who solve their serious financial problems will be happy. => I doubt about this choice. However, I focussed on the word "can" in the passage, that means just a possibility.
(C) People who do not have serious financial problems will be happy. => Out of scope. The passage does not mention anything about other kind of problems and happiness.
(D) If people are unhappy, they have serious financial problems. => Too broad. The passage only talks about the relation financial problems and unhappiness.
(E) If people are happy, they do not have serious financial problems. => OK. It is the paraphrase of the last sentence.

Q2 - The conclusion of the argument is properly drawn if which one of the following is assumed?
(A) The cost of producing electric power at traditional plants has increased over the past 20 years. => Not assumed. It is stated in the passage.
(B) Twenty years ago, traditional power plants were producing 10 times more electric power than were photovoltaic plants. => Out of scope. The passage talks about the cost of producing but not about the quantity of it.
(C) None of the recent technological advances in producing electric power at photovoltaic plants can be applied to producing power at traditional plants. => OK. It is assumed that the cost of producing electricity in both plants would continue with the same conditions.
(D) Twenty years ago, the cost of producing electric power at photovoltaic plants was less than 20 times the cost of producing power at traditional plants. => Not assumed. It is nearly stated in the passage.
(E) The cost of producing electric power at photovoltaic plants is expected to decrease further, while the cost of producing power at traditional plants is not expected to decrease. => I doubt about this choice. However, I focussed on that the decrease in the cost of producing in photovoltaic power plants is as a result of technological advances and not of a trend.

Please let me know if I am right or wrong in my reasoning.
Cheers.

[Lhomme]

IMO E, D

1-People with serious financial problems are so worried about money that they cannot be happy. Their misery makes everyone close to them—family, friends, colleagues—unhappy as well. Only if their financial problems are solved can they and those around them be happy.
Which one of the following statements can be properly inferred from the passage?

Lets break the arguments into logical statements

(i)People with serious Financial problems---> people Unhappy
(ii)Only if their serious Financial problems are solved--->people happy

Now lets attack each statement

(A) Only serious problems make people unhappy.....type of problems is not an issue here, out of scope
(B) People who solve their serious financial problems will be happy.....this is close to logical statement (ii), however, it is the solution to the financial problem that makes people happy. It is not relevant to who solves it. It could be solved by someone else and still they can be happy.
(C) People who do not have serious financial problems will be happy.....Not necessary. We know that in order for people to be happy, they shouldn't have any serious financial problems. However, it cannot be certain that people will be happy.
(D) If people are unhappy, they have serious financial problems....this is illogical representation of (i), (i) states that people with serious financial problems cannot be happy. The reverse is not necessarily true, as is implied here.
(E) If people are happy, they do not have serious financial problems....this is correctly implied

2-Photovoltaic power plants produce electricity from sunlight. As a result of astonishing recent technological advances, the cost of producing electric power at photovoltaic power plants, allowing for both construction and operating costs, is one-tenth of what it was 20 years ago, whereas the corresponding cost for traditional plants, which burn fossil fuels, has increased. Thus, photovoltaic power plants offer a less expensive approach to meeting demand for electricity than do traditional power plants.
The conclusion of the argument is properly drawn if which one of the following is assumed?

Let the construction and operating costs of the 2-Photovoltaic power plants 20 years ago be X.
Hence, now the cost is X/10

Let the cost of traditional plants 20 years ago be Y.
We know that Y has been increasing and is greater now, say Z than 20 years back.

we need to find an assumption for the following conclusion:
"photovoltaic power plants offer a less expensive approach to meeting demand for electricity than do traditional power plants"
NOw, lets attack the statements

(A) The cost of producing electric power at traditional plants has increased over the past 20 years.....we already know this. It is stated in the argument, It is not an assumption.
(B) Twenty years ago, traditional power plants were producing 10 times more electric power than were photovoltaic plants....out of scope
(C) None of the recent technological advances in producing electric power at photovoltaic plants can be applied to producing power at traditional plants....out of scope.
(D) Twenty years ago, the cost of producing electric power at photovoltaic plants was less than 20 times the cost of producing power at traditional plants...this states that,
X < Y, hence, X/10 has to be less than Z. If this assumption was not true, then the conclusion cannot be true.
An example to prove this,
say X = 50,000, Y = 1000
say Y increased to 4,000 over 20 years, meaning Z = 4,000,
we know X/10 = 5000. Hence the conclusion cannot be true.
Hence, without this assumption there is no guarantee that the conclusion will be true.
(E) The cost of producing electric power at photovoltaic plants is expected to decrease further, while the cost of producing power at traditional plants is not expected to decrease....we are not interested in the future trend, we are more interested in confirming the conclusion stated above.

[despmba]

1 was pretty straight forward answer is E
2 . There is no mention of how the costs of power generation between photo voltaic cells and traditional power sources relate to each other. The statement only talks about how the decrease in costs compare. Hence any argument that throws light on the relation between the two in terms of actual costs would help bolster the conclusion drawn. This is done only in D

[CACERJ01]

Hi Dream_GMAT,

Please, can you post the OAs for these questions?
Thanks in advance.

Cheers.

[playboy]

I completely agree with Lhomme. IMO E and D.