Bunuel wrote:

Is g+h > 3.6?

(1) 1.612 < g < 1.718

(2) 1.987 < h < 2.803

Kudos for a correct solution.

The statement alone is not enough, we will need information about both g and h to determine sufficiency.

1) only have information on g - not sufficient.

2) only have information on h - not sufficient.

Together: We have information on both so that is good. But we still cannot give a definitive yes or no answer because we still have an answer possible on either side of the argument as shown below.

Taking the obvious low values of g=1.613 and h=1.988 we get: 1.613+1.988=3.601 which would tell us that yes g+h>3.6.

BUT BE CAREFUL, there is an infinite number of values lower than 1.613 and 1.612 as well with 1.988 and 1.987

Taking another example of low values where g=1.6121 and h=1.9871 we get 1.6121+1.9871=3.5992 which would tell us that g+h<3.6 and thus a no to the original question.

Since neither of the answers alone and both together to do not provide sufficient information to answer the question select answer choice E.

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