QUESTION)
Is x+ y < 1
1) x< 8/9
2) y< 1/8
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Is the answer is C ?cmal_s wrote:QUESTION)
Is x+ y < 1
1) x< 8/9
2) y< 1/8
Stnt 1) is not sufficent alone as we dont know the y value ,simlar scenario for Stnt 2.
So with the combination we can determine the condition.
Please let me know whether this explanation is correct.
cmal_s, what is the answer?
i have my answer as C. but newton has a point.
if we were to let x to be 7.9/9 and y to be 0.9/9 then we might have an answer which is more than 1 as well as less than 1.
is E correct then? any other explanation would be really helpful.
i have my answer as C. but newton has a point.
if we were to let x to be 7.9/9 and y to be 0.9/9 then we might have an answer which is more than 1 as well as less than 1.
is E correct then? any other explanation would be really helpful.
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each statement alone is insufficient, finecmal_s wrote:QUESTION)
Is x+ y < 1
1) x< 8/9
2) y< 1/8
add the two inequalities and get
x + y < 8/9 + 1/8 or x + y < 73/72
now, a sum less than 73/72 can be less than, or equal to, or more than 1, so [spoiler]E[/spoiler]
The mind is everything. What you think you become. -Lord Buddha
Sanjeev K Saxena
Quantitative Instructor
The Princeton Review - Manya Abroad
Lucknow-226001
www.manyagroup.com
Sanjeev K Saxena
Quantitative Instructor
The Princeton Review - Manya Abroad
Lucknow-226001
www.manyagroup.com
i agree with the above posts.
E is the right answer and here's why:
once you derive x+y < 73/72, it becomes clear you can come up with two numbers that are either < 1 (i.e. negative numbers for both x and y) or a pair of numbers whose sum is greater than 1 AND less than 73/72 (i.e. 729/720).
gg gl
E is the right answer and here's why:
once you derive x+y < 73/72, it becomes clear you can come up with two numbers that are either < 1 (i.e. negative numbers for both x and y) or a pair of numbers whose sum is greater than 1 AND less than 73/72 (i.e. 729/720).
gg gl
