Subject
Bank Exam
Topic
Joint Recruitment Test for 8 Banks (SO) [03-09-2019, AUST
[ Read the following questions carefully and choose the right answer. ]There are 2 numbers in the ratio of 4 : 5. If 4 is subtracted from both numbers the ratio becomes 3:4. What will be the ratio if 4 is added in the both numbers ?
[ Read the following questions carefully and choose the right answer. ]There are 2 numbers in the ratio of 4 : 5. If 4 is subtracted from both numbers the ratio becomes 3:4. What will be the ratio if 4 is added in the both numbers ?
ক)
1 : 2খ)
2 : 3গ)
5 : 6ঘ)
1 : 4Explanation
প্রশ্নে বলা হচ্ছে, দুটি সংখ্যার অনুপাত 4 : 5. সংখ্যা দুটি হতে 4 করে কমালে তাদের অনুপাত হয় 3 : 4 . কিন্তু সংখ্যা দুটির সাথে 4 করে যোগ করা হলে তাদের অনুপাত কত হবে ? ধরি, সংখ্যা দুটি যথাক্রমে 4x এবং 5x প্রশ্নমতে, 4x-4/5x-4 = 3/4 => 16x - 16 = 15x - 12 => 16x - 15x = 16 - 12 x = 4 অতএব, একটি সংখ্যা 4x = 4 × 4 = 16 এবং অপর সংখ্যা 5x = 5 × 4 = 20 . নির্ণেয় অনুপাত = ( 16+4 ) : (20+4) = 20 : 24 = 5 : 6Related questions
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