Direction: Each o the following questions is followed by two statements. Mark
-
Is 'Ube' positive?
I. a + b is positive.
II. a - b is positive.
-
- if statement I alone is sufficient to answer the question.
- if statement II alone is sufficient to answer the question.
- if both statement I and II together are necessary to answer the question.
- if both statement I and II together are not sufficient to answer the question.
Correct Option: D
If we look at statement I then we will get
If a = 3 and b = 2, a + b > 0. Here b > 0
If a = 3 and b = -2, a + b > 0. Here b < 0
Hence I alone is not sufficient.
Now if we look at Statement II only then we will get
if a = 3 and b 2, a - b > 0. Here b > 0
If a = 3 and b = -2, a - b > 0. Here b < 0
Hence II alone is not sufficient.
Now by using statements I and II together
If a = 3 and b = 2, a - b > 0 and a + b > 0. Here b > 0
If a = 3 and b = -2, a - b > 0. and a + b > 0. Here b < 0.
Hence I and II together are also insufficient.
