A number is decreased by 10% and then increased by 20%. The net change is: MCQ with Answer and Explanation
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Question #1
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A's salary is 30% less than B's. If B's salary is 6000, A's salary is:
Correct Answer: Option D
Explanation:
A's salary = 6000 × 0.7 = 4200.
A's salary = 6000 × 0.7 = 4200.
This question belongs to:
Maths
Percentage
Question #2
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In an examination, 80% passed in English, 70% in Mathematics, and 10% failed in both. If 144 students passed in both, total students:
Correct Answer: Option B
Explanation:
Failed English=20%, Maths=30%. Passed both = 100 - (20+30-10) = 60%. 60% = 144 → total=240.
Failed English=20%, Maths=30%. Passed both = 100 - (20+30-10) = 60%. 60% = 144 → total=240.
This question belongs to:
Maths
Percentage
Question #3
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Price increased 15% then decreased 10%. Net change:
Correct Answer: Option B
Explanation:
1.15×0.9 = 1.035, increase 3.5%.
1.15×0.9 = 1.035, increase 3.5%.
This question belongs to:
Maths
Percentage
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