In a certain population, there are 3 times as many people aged twenty-one or under as there are people over twenty-one. The ratio of those twenty-one or under to the total population is_

• ক 1 to 4
• খ 3 to 4 ✅ সঠিক উত্তর
• গ 2 to 3
• ঘ 1 to 3