A total of Tk 1200 is deposited in two savings accounts for one year, part at 5% and the remainder at 7% interest rate. If Tk 72 was earned in interest, how much was deposited at 5%?

A Tk 300
B Tk 450
C Tk 600
D Tk 760

Correct Answer: Tk 600

ধরি, 5% এ x টাকা, 7% এ (1200 - x) টাকা invest করা হয়েছিল তাহলে, (1200 - x)*7/100 + x*5/100 = 72 বা, (1200 - x)*7 + 5x = 7200 বা, 8400 - 7x + 5x = 7200 বা, - 2x = - 1200 so, x = 600
Bissoy MCQ
#গণিত #সরল ও যৌগিক মুনাফা  (Simple & Compound interest) #Similar to Bank Ltd #Forest Industries Development Corporation - Asst. Manager - 02.08.2013

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