12. A person deposited 500 for 4 yr...
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12. A person deposited 500 for 4 yr and * 600 for 3 yr at the same rate of simple interest in a bank. Altogether he received * 190 as interest. The rate of simple interest per annum was RRB NTPC (Phase-1) 2016 (1) 4% (2) 5% (3) 2% (4) 3%

11th - 12th Class
Maths
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Xet x be the interest. Crist anount, ( left(500 times frac{x}{100}right) times 4=20 x ) On end anount ( left(600 times frac{x}{100}right) times 3=18 x ) Total: ( 20 x+18 x=190 ) 38 ( x=190 ) ( therefore x=5 cdot 1 . )
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