Subject
Bank Exam
Topic
সমন্বিত ৯ ব্যাংক আর্থিক প্রতিষ্ঠান (সিনিয়র অফিসার)-২০.০১.২০২৩
The present ratio of students to teachers at a certain school is 30 to 1. If the number of students were to increase by 50 and that of teachers were to increase by 5, the ratio of students to teachers would then be 25 to 1. What is the present number of teachers?
The present ratio of students to teachers at a certain school is 30 to 1. If the number of students were to increase by 50 and that of teachers were to increase by 5, the ratio of students to teachers would then be 25 to 1. What is the present number of teachers?
ক)
8খ)
10গ)
12ঘ)
15Explanation
মনে করি, চাত্র সংখ্যা=30x শিক্ষক সংখ্যা =x প্রশ্নমতে, 30x + 50 : x+5 = 25: 1 ⇒30x + 50 /x+5 = 25/1 ⇒30x + 50 =25x + 125 ⇒ 5x = 75 ⇒ x = 15Related questions
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