After taking 30 socks out of the dryer, Dina noticed that the ratio of blue socks to brown socks to black socks was 2:3:5. How many black socks were in the dryer?

A 21
B 15
C 9
D None of these

Correct Answer: 15

Blue, brown এবং black মোজার আনুপাতিক মানের যোগফল (2 + 3 + 5) = 10so black মোজার সংখ্যা = 30×<math xmlns = "http://www.w3.org/1998/Math/MathML"><mfrac><mn>5</mn><mn>10</mn></mfrac></math> = 15 টি
Bissoy MCQ
#গণিত #অনুপাত-সমানুপাত (Ratio-Proportion) #Mutual Trust Bank Ltd #Mutual Trust Bank ltd - Probationary Officer - 2016

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