RRB NTPC · Question 12
Statements: 1. X is 7 meters tall, Y is half as high and Z is 3 times the height of X. 2. P is taller than Z but shorter than A and B. Conclusions: I. B is the tallest of all. II. The average height of X, Y and Z is less than 10 meters. Find which of the given conclusions logically follows from the given statements. A. Only conclusion I follows. B. Only conclusion II follows. C. Both I and II follow. D. Neither I nor II follows.
Show answer & explanation
Answer: (B) D
Explanation
X = 7 m, Y = 3.5 m and Z = 21 m. P is taller than Z but shorter than A and B, but A and B are not compared with each other, so we cannot say B is the tallest; I does not follow. The average of X, Y and Z is (7 + 3.5 + 21)/3 = 10.5 m, which is more than 10 m, so II does not follow either.