Population increases 6% annually. Present 1,50,000, after 2 years population: MCQ with Answer and Explanation

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Population increases 6% annually. Present 1,50,000, after 2 years population:

A. 1,75,000

B. 1,68,540

C. 1,65,000

D. 1,70,000

Answer: Option B

Solution (By JKSSB Mock Tests)

1,50,000 × 1.06² = 1,68,540.

This question belongs to: Maths Percentage

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Question #1

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A trader bought articles for Rs. 1200. Ten were damaged, rest sold at Rs. 2 more than CP each, total profit Rs. 60. Number of articles:

A. 100

B. 90

C. 110

D. 80

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Correct Answer: Option A

Explanation:
Let n articles, CP each = 1200/n. Sold (n-10) at (1200/n + 2). Total SP = (n-10)(1200/n +2) = 1260. Solving gives n=100.

This question belongs to: Maths Percentage

Question #2

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A's income 30% less than B, B's 20% less than C. C's income is what % more than A's?

A. 80%

B. 78.57%

C. 66.67%

D. 72.5%

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Correct Answer: Option B

Explanation:
A=0.7B, B=0.8C → A=0.56C → C = A/0.56, more = (0.44/0.56)×100 = 78.57%.

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Question #3

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A student multiplied a number by 3/4 instead of 4/3. What is the percentage error?

A. 45%

B. 43.75%

C. 40%

D. 50%

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Correct Answer: Option B

Explanation:
True = 4/3x. False = 3/4x. Error = (4/3 - 3/4)x = (7/12)x. % Error = ((7/12) / (4/3)) * 100 = (21/48) * 100 = 43.75%.

This question belongs to: Maths Percentage

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