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Direction: In these questions, a question is given followed by information in three statements. You have to consider the information in all the three statements and decide the information in which of the statements is not necessarily required to answer the question and therefore can be dispensed with. Indicate your answer accordingly.
What is the value of a?
I. 5a4 – a3 + 25a – 2 ≥ 3
II. 5a ≥ 125a2
III. 4a ≥ 0
  • a)
    Only II
  • b)
    Only III
  • c)
    Either II or III
  • d)
    Either I or II
  • e)
    None of the above
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
Direction: In these questions, a question is given followed by inform...
By statement II,
5a ≥ 125a2
⇒ 1 ≥ 5a
⇒ a ≤ 1/5
Substituting above value in statement I,
∴ Statements III is not necessarily required to answer the question
Hence, the correct option is (B).
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Direction: In these questions, a question is given followed by information in three statements. You have to consider the information in all the three statements and decide the information in which of the statements is not necessarily required to answer the question and therefore can be dispensed with. Indicate your answer accordingly.What is the value of a?I. 5a4 – a3 + 25a – 2 ≥ 3II. 5a ≥ 125a2III. 4a ≥ 0a)Only IIb)Only IIIc)Either II or IIId)Either I or IIe)None of the aboveCorrect answer is option 'B'. Can you explain this answer?
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