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The ratio of boys to girls in a class is 3 to 2. If there are 30 boys, how many students are there in total?

Correct answer: B. 50

  • A. 45
  • B. 50
  • C. 40
  • D. 60

Explanation

Three parts correspond to 30 boys, so one part is 10 and the two parts of girls are 20, giving 50 students in total. Answering 45 comes from adding the wrong number of parts. Finding the value of a single part first is the reliable route through any ratio question.

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About Logical Problems

Logical problems present several conditions about people, objects, events or choices and require their possible arrangements to be tested. They cover constraint-based reasoning, rankings, matching, grouping, scheduling and elimination, with attention to the difference between a complete solution and a possibility that merely satisfies one condition.

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