CAT 1995QA Question 33

Solving InequalitiesEasy

What is the value of m which satisfies 3m2 – 21m + 30 < 0?

Answer & solution

Correct answer: 2 < m < 5

  • A

    m < 2 or m > 5

  • B

    m > 2

  • 2 < m < 5

  • D

    Both (a) and (c)

Solution

3m2 – 21m + 30 < 0

∴ m2 – 7m + 10 < 0 ⇒ (m – 5)(m – 2) < 0.

⇒ (m – 5) < 0 and (m – 2) > 0

∴ 2 < m < 5.

Hence, option (c).

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CAT 1995 QA Q33: What is the value of m which satisfies 3m 2 &ndash; 21m + 30 < 0? — Solution | TheCATExam