If the numerator of a fraction is increased by 20% and its denominator is decreased by 10%, the fraction becomes 3/5. Find the original fraction. MCQ with Answer and Explanation
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Question #1
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In a bag, 60% are red balls, 30% are blue balls, and the rest are green balls. If 5% of red, 10% of blue, and 20% of green balls are defective, what percent of the total balls are defective?
Correct Answer: Option A
Explanation:
Red=60, Blue=30, Green=10. Defective: Red 0.05×60=3, Blue 0.1×30=3, Green 0.2×10=2. Total defective=8%. So answer 8%.
Red=60, Blue=30, Green=10. Defective: Red 0.05×60=3, Blue 0.1×30=3, Green 0.2×10=2. Total defective=8%. So answer 8%.
This question belongs to:
Maths
Percentage
Question #2
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A machine depreciates 12% per year. Its value after 1 year if purchased for Rs. 60,000 is:
Correct Answer: Option C
Explanation:
60,000 × 0.88 = 52,800.
60,000 × 0.88 = 52,800.
This question belongs to:
Maths
Percentage
Question #3
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A man spends 30% on rent, 20% of the remainder on food, and 25% of the next remainder on education. If he saves Rs. 5460, find his monthly income.
Correct Answer: Option D
Explanation:
Rent 30%, left 70%. Food 20% of 70%=14% of income, left 56%. Education 25% of 56%=14% of income, left 42% = 5460 → income = 5460/0.42 = 13000.
Rent 30%, left 70%. Food 20% of 70%=14% of income, left 56%. Education 25% of 56%=14% of income, left 42% = 5460 → income = 5460/0.42 = 13000.
This question belongs to:
Maths
Percentage
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