Population 2,00,000. First year +8%, second year -5%. Population after 2 years: MCQ with Answer and Explanation

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Population 2,00,000. First year +8%, second year -5%. Population after 2 years:

A. 2,08,800

B. 2,06,400

C. 2,05,200

D. 2,07,600

Answer: Option C

Solution (By JKSSB Mock Tests)

2,00,000 × 1.08 × 0.95 = 2,05,200.

This question belongs to: Maths Percentage

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Question #1

Value of a scooter depreciates 8% per year. Price 50,000, after 1 year value is:

A. 47,000

B. 46,000

C. 48,000

D. 45,000

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Correct Answer: Option B

Explanation:
Value = 50,000 × 0.92 = 46,000.

This question belongs to: Maths Percentage

Question #2

Price of a commodity falls by 20%. To keep expenditure constant, consumption must increase by:

A. 25%

B. 30%

C. 15%

D. 20%

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Correct Answer: Option A

Explanation:
New price 0.8, consumption multiplier needed = 1/0.8 = 1.25, increase 25%.

This question belongs to: Maths Percentage

Question #3

The ratio of the number of boys to girls in a class is 3:2. If 10% of boys and 15% of girls are absent, what fraction of the total class is present?

A. 17/25

B. 33/50

C. 87/100

D. 22/25

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Correct Answer: Option B

Explanation:
Total = 3k+2k=5k. Present boys=0.9×3k=2.7k, present girls=0.85×2k=1.7k, total present=4.4k. Fraction = 4.4k/5k = 44/50 = 22/25. So answer 22/25, option D. Wait, 4.4/5 = 0.88 = 22/25. So D. I'll set options accordingly.

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