A collection of books went on sale and two-third of them was sold for Tk 2.30 each. If none of the 36 remaining books were sold, what was the total amount received for the books that were sold?
A
180
B
135
C
90
D
60
Correct Answer: 180
বিক্রীত বই <math xmlns = "http://www.w3.org/1998/Math/MathML"><mfrac><mn>2</mn><mn>3</mn></mfrac></math> অংশ⸫ অবিক্রীত বই <math xmlns = "http://www.w3.org/1998/Math/MathML"><mn>1</mn><mo> - </mo><mfrac><mn>2</mn><mn>3</mn></mfrac><mo> = </mo><mfrac><mn>1</mn><mn>3</mn></mfrac></math> অংশ⸫ বইয়ের <math xmlns = "http://www.w3.org/1998/Math/MathML"><mfrac><mn>1</mn><mn>2</mn></mfrac></math> অংশ = 36 টি তাই <math xmlns = "http://www.w3.org/1998/Math/MathML"><mfrac><mn>2</mn><mn>3</mn></mfrac></math> অংশ = 36×2 = 72 টি ⸫ 72 টি বইয়ের (72×2.50) = 180 টাকা