Question : Nine students in a class contribute a certain sum of money. Seven of them gave Rs. 50 each, and the other two gave, respectively, Rs. 50 and Rs. 90 more than the average contribution. The average contribution of the class of nine students is:
Option 1: Rs. 70
Option 2: Rs. 50
Option 3: Rs. 100
Option 4: Rs. 120
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Correct Answer: Rs. 70
Solution : Let the average contribution of the class of nine students be $x$. $x=\frac{7×50+x+50+x+90}{9}$ ⇒ $9x=2x+490$ ⇒ $7x=490$ $\therefore x=70$ Hence, the correct answer is 70.
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Question : The compound interest on a certain sum of money for 2 years at 5% interest is Rs. 328. The sum is:
Option 1: Rs. 3000
Option 2: Rs. 3600
Option 3: Rs. 3200
Option 4: Rs. 3400
Question : A certain sum of money was divided between A, B, and C in the ratio of 5 : 6 : 9. If A received Rs. 450, the sum divided was:
Option 1: Rs. 2000
Option 2: Rs. 1800
Option 3: Rs. 2250
Option 4: Rs. 1000
Question : A person lent a certain sum of money at the annual rate of 25 percent on simple interest. In 6 years the interest amounted to Rs. 360 more than the sum lent. What is the sum lent?
Option 1: Rs. 600
Option 2: Rs. 360
Option 3: Rs. 720
Option 4: Rs. 540
Question : A person lent a certain sum of money at the annual rate of 7% on simple interest and the interest received in 11 years is Rs. 920 less than the sum lent. What is the sum lent?
Option 1: Rs. 41200
Option 2: Rs. 4000
Option 3: Rs. 52000
Option 4: Rs. 2400
Question : A sum of money amounts to Rs. 6655 at the rate of 10% compounded annually for 3 years. The sum of money is:
Option 1: Rs. 5000
Option 2: Rs. 5500
Option 3: Rs. 6000
Option 4: Rs. 6100
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