Correct Answer: B) ₹12,000
Explanation:
If 40% of the salary is saved, then:
0.40 \times \text{Salary} = 4800
\text{Salary} = \frac{4800}{0.40} = 12000
A) ₹900
B) ₹850
C) ₹950
D) ₹1,000
Correct Answer: A) ₹900
Explanation:
The selling price after a 25% discount is calculated as:
\text{Selling Price} = 1200 \times (1 – \frac{25}{100}) = 1200 \times 0.75 = 900
A) 400
B) 360
C) 280
D) 300
Correct Answer: D) 300
Explanation:
Let the number be x .
So, 0.45 \times x = 180
x = \frac{180}{0.45} = 400
A) ₹11,000
B) ₹12,000
C) ₹13,100
D) ₹14,000
Correct Answer: B) ₹12,000
Explanation:
If 40% of the salary is saved, then:
0.40 \times \text{Salary} = 4800
\text{Salary} = \frac{4800}{0.40} = 12000
A) 40%
B) 50%
C) 30%
D) 25%
Correct Answer: A) 40%
Explanation:
Percentage increase = \frac{700 – 500}{500} \times 100 = \frac{200}{500} \times 100 = 40%
A) 80
B) 85
C) 90
D) 100
Correct Answer: C) 90
Explanation:
Let the total marks be x .
0.80 \times x = 72
x = \frac{72}{0.80} = 90
A) 20%
B) 25%
C) 30%
D) 40%
Correct Answer: D) 40%
Explanation:
Increase = 400 – 320 = 80
Percentage increase = \frac{80}{320} \times 100 = 25%
A) 60,000
B) 55,000
C) 60,500
D) 50,000
Correct Answer: A) 60,000
Explanation:
Population after 2 years = 50,000 \times (1 + \frac{10}{100})^2
= 50,000 \times 1.1 \times 1.1 = 60,500
A) 16.67%
B) 17.67%
C) 26.67%
D) 27.67%
Correct Answer: A) 16.67%
Explanation:
Required reduction percentage = \frac{20}{120} \times 100 = 16.67%
A) 10
B) 12
C) 14
D) 16
Correct Answer: B) 12
Explanation:
Number of women = 40 \times \frac{30}{100} = 12
A) ₹3,52,000
B) ₹3,57,125
C) ₹3,57,725
D) ₹3,75,000
Correct Answer: B) ₹3,57,125
Explanation:
Value after 3 years = 5,00,000 \times (1 – \frac{15}{100})^3
= 5,00,000 \times 0.85 \times 0.85 \times 0.85 = 3,57,125
A) ₹12,000
B) ₹15,000
C) ₹18,000
D) ₹20,000
Correct Answer: D) ₹20,000
Explanation:
If 30% of income is saved, then:
0.30 \times \text{Income} = 6000
\text{Income} = \frac{6000}{0.30} = 20,000
A) 10
B) 12
C) 15
D) 18
Correct Answer: B) 12
Explanation:
Total marks = \frac{56}{0.70} = 80
To score 85%: 0.85 \times 80 = 68
Marks needed = 68 – 56 = 12
A) 5% decrease
B) 10% decrease
C) 5% increase
D) 10% increase
Correct Answer: A) 5% decrease
Explanation:
Let the initial price be 100 .
New price after a 20% increase = 100 \times 1.20 = 120
Price after 25% decrease = 120 \times 0.75 = 90
Net change = 100 – 90 = 10%
A) 5%
B) 10%
C) 15%
D) 20%
Correct Answer: B) 10%
Explanation:
35% of 200 = 0.35 \times 200 = 70
\frac{70}{700} \times 100 = 10%
A) 45
B) 50
C) 55
D) 60
Correct Answer: D) 60
Explanation:
Let the number be x .
0.18x + 45 = x
x = 60
A) 4.5% increase
B) 4.5% decrease
C) 5% increase
D) 5% decrease
Correct Answer: A) 4.5% increase
Explanation:
Net change = 10 – 5 – \frac{(10 \times 5)}{100} = 4.5
Therefore, the net percentage change is a 4.5% increase.
A) 4% profit
B) 4% loss
C) 5% profit
D) 5% loss
Correct Answer: C) 5% profit
Explanation:
Let the cost price be 100 . After a 50% markup, the price becomes 150 .
After a 30% discount on 150 :
\text{Selling Price} = 150 \times 0.70 = 105
Profit = 105 – 100 = 5%
A) 2.5% increase
B) 2.5% decrease
C) 5% increase
D) 5% decrease
Correct Answer: A) 2.5% increase
Explanation:
Let the original number be 100 .
After a 25% decrease, it becomes 75 .
After a 30% increase: 75 \times 1.30 = 97.5
Net change = 2.5% increase.
A) ₹15,000
B) ₹20,000
C) ₹25,000
D) ₹18,000
Correct Answer: B) ₹20,000
Explanation:
If 35% of income is saved, then:
0.35 \times \text{Income} = 7000
\text{Income} = \frac{7000}{0.35} = 20,000
A) 720
B) 800
C) 900
D) 600
Correct Answer: C) 900
Explanation:
Let the number be x .
0.20x = 120
x = \frac{120}{0.20} = 600
Then, 1.50 \times 600 = 900
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