Algebra-1

Question Analysis
This question tests the student's ability to solve a proportion problem in a real-world context. The given ratio of boys to girls is 3:4, and the problem requires finding the number of boys when the number of girls is known.

Key Concept Explanation
Proportions are used to solve problems involving ratios. The cross-multiplication rule states that if , then . This rule is applied to find the unknown value in the proportion.

Step-by-step Solution
1. Set up the proportion:
2. Cross-multiply:

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