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Question: What is the number of students in Class IX?Statements:1. Class IX has 20% more students than Class VIII.2. Class VIII and Class I…

Question: What is the number of students in Class IX?

Statements:

1. Class IX has 20% more students than Class VIII.

2. Class VIII and Class IX together have 220 students.

Which one of the following is correct?

  • AStatement 1 alone is sufficient
  • BStatement 2 alone is sufficient
  • CBoth statements together are sufficient, but neither alone is sufficient
  • DBoth statements together are not sufficient
Correct answer: C

Explanation

Together: x + 1.2x = 220 gives x = 100 for Class VIII and 120 for Class IX. Each statement alone leaves two unknowns.

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