With ratio of boys to girls 3:4 and 21 boys, how many girls are there?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $24.99Unlock all

Prepare for the GATE General Aptitude and CS Test. Enhance your skills with multiple choice questions and detailed explanations. Elevate your readiness and boost your confidence for the exam!

Multiple Choice

With ratio of boys to girls 3:4 and 21 boys, how many girls are there?

Explanation:
When numbers are in a ratio, you scale by a common unit. For boys to girls being 3:4, express them as B = 3k and G = 4k. Given 21 boys, 3k = 21, so k = 7. The girls then are G = 4k = 4 × 7 = 28. So there are 28 girls. You can also check with a quick proportion: (21 × 4) / 3 = 28.

When numbers are in a ratio, you scale by a common unit. For boys to girls being 3:4, express them as B = 3k and G = 4k. Given 21 boys, 3k = 21, so k = 7. The girls then are G = 4k = 4 × 7 = 28. So there are 28 girls. You can also check with a quick proportion: (21 × 4) / 3 = 28.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy