Number increased 40% then decreased 30%. Net change: MCQ with Answer and Explanation

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Number increased 40% then decreased 30%. Net change:

A. 2% decrease

B. 2% increase

C. 10% decrease

D. No change

Answer: Option A

Solution (By JKSSB Mock Tests)

1.4 × 0.7 = 0.98, 2% decrease.

This question belongs to: Maths Percentage

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Question #1

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Spends 30% on food, 20% rent, 15% clothing, saves Rs. 5250. Income:

A. 15000

B. 16000

C. 14000

D. 12000

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Correct Answer: Option A

Explanation:
Spends 65%, saves 35% = 5250, income = 5250/0.35 = 15000.

This question belongs to: Maths Percentage

Question #2

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In an examination, 35% students failed in English, 30% failed in Mathematics and 20% failed in both. If the total number of students passing in both subjects is 550, find the total number of students.

A. 1000

B. 800

C. 900

D. 1100

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Correct Answer: Option A

Explanation:
Failed in at least one = 35+30-20 = 45%. Passed in both = 55% = 550 → total = 550/0.55 = 1000.

This question belongs to: Maths Percentage

Question #3

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Price of sugar increased 30%. Expenditure to rise only 10%. Consumption reduced by:

A. 15.38%

B. 16.67%

C. 14.5%

D. 18%

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Correct Answer: Option A

Explanation:
1.3 × x = 1.1 → x = 1.1/1.3 ≈ 0.84615, reduction 15.38%.

This question belongs to: Maths Percentage

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