9
Q:

Prasanna invested certain amount in three different schemes X, Y and Z with the rate of interest 10% p.a, 12% p.a and 15% p.a respectively. If the total interest accrued in one year was Rs. 3200 and the amount invested in Scheme Z was 150% of the amount invested in Scheme X and 240% of the amount invested in Scheme Y, what was the amount invested in Scheme Y by Prasanna ?

A) Rs.6000 B) Rs.4500
C) Rs.7500 D) Rs.5000

Answer:   D) Rs.5000



Explanation:

Let a, b and c be the amounts invested in schemes X, Y and Z respectively. Then,

As we know:

Simple interest (S.I.) = PTR/100

(a × 10 × 1/100) + (b × 12 × 1/100) + (c × 15 × 1/100) = 3200

= 10a + 12b + 15c = 320000 .........(1)

Now, c = 240% of b = 12b/5 .........(2)

And, c = 150% of a = 3a/2 => a = 2/3 c = (2 × 12)b/(3 × 5) = 8b/5 .......(3)

From (1), (2) and (3), we have

16b + 12b + 36b = 320000 => 64b = 320000 => b = 5000

∴ Sum invested in Scheme Y = Rs.5000.

Q:

A, B and C donate 8%, 7% and 9%, of their salaries, respectively to a charitable trust. The salaries of A and B are same and the difference between their donations is Rs. 259. The total donation of A and B is Rs. 1,185 more than that of C. The total donation of A and C is what percentage of the total salaries of A, B and C? (Correct to one decimal place

 

A) 6.2%   B) 5.8%  
C) 6.4%   D) 7.1%  
 
Answer & Explanation Answer: B) 5.8%  

Explanation:
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2 244
Q:

If the selling price of an article is 8% more than the cost price and the discount offered is 10% on the marked price of the article, then what is the ratio of the cost price to the marked price?

 

A) 5 : 6   B) 8 : 9  
C) 3 : 4   D) 4 : 5  
 
Answer & Explanation Answer: A) 5 : 6  

Explanation:
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3 201
Q:

A boy has 120 balls of which some are white and the remaining are black. If the percentage of white balls is 45%, find the number of black balls he has.

 

A) 56 B) 66
C) 64 D) 54
 
Answer & Explanation Answer: B) 66

Explanation:
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2 246
Q:

Srinivas works and earns Rs.14,500 per month, out of which he saves only 20% and spends the remaining amount on other deeds. Find the amount spent

A) ₹ 11,500 B) ₹ 11,400
C) ₹ 11,000 D) ₹ 11,600
 
Answer & Explanation Answer: D) ₹ 11,600

Explanation:
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1 1612
Q:

In an examination, Anita scored 31% marks and failed by 16 marks. Sunita scored 40% marks and obtained 56 marks more than those required to pass. Find the minimum marks required to pass.

 

A) 3116   B) 264  
C) 3944   D) 7100  
 
Answer & Explanation Answer: B) 264  

Explanation:
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7 425
Q:

If the radius of a right circular cylinder is decreased by 10%, and the heightis increased by 20%, then the percentage increase/decreasein its volumeis:

 

A) increase by 2.8% B) decrease by 1.8%
C) increase by 1.8% D) decrease quadrilateral by in 2.8%
 
Answer & Explanation Answer: D) decrease quadrilateral by in 2.8%

Explanation:
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0 314
Q:

A and B spend 60% and 75% of their incomes, respectively. If the savings of A are 20% more than that of B. then by what percentage is the income of A less than the income of B?

 

A) 15 B) 20
C) 10 D) 25
 
Answer & Explanation Answer: D) 25

Explanation:
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2 360
Q:

The price of sugaris increased by 20%. By what percentage must one cut down on the consumption of sugar, so that no extra amount has to be incurred on sugar?

 

A) 1623°° B) 20°°
C) 80°° D) 8313°°
 
Answer & Explanation Answer: A) 1623°°

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3 286