Machine depreciates 10% per year. Present value Rs. 81,000, value 2 years ago was: MCQ with Answer and Explanation
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Question #1
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In a class of 50 students, 40% are girls. If 10% of boys and 20% of girls wear spectacles, how many students wear spectacles?
Correct Answer: Option D
Explanation:
Boys=30, girls=20. Spectacles: 10% of 30=3, 20% of 20=4, total 7.
Boys=30, girls=20. Spectacles: 10% of 30=3, 20% of 20=4, total 7.
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Percentage
Question #2
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Fresh grapes contain 68% water while dry grapes contain 20% water. How many kilograms of dry grapes can be obtained from 100 kg of fresh grapes?
Correct Answer: Option B
Explanation:
Quantity of pulp in fresh grapes = 100% - 68% = 32%. So, pulp = 32 kg. In dry grapes, pulp is 100% - 20% = 80%. Let dry grapes be D kg. 80% of D = 32 implies D = (32 / 0.8) = 40 kg.
Quantity of pulp in fresh grapes = 100% - 68% = 32%. So, pulp = 32 kg. In dry grapes, pulp is 100% - 20% = 80%. Let dry grapes be D kg. 80% of D = 32 implies D = (32 / 0.8) = 40 kg.
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Percentage
Question #3
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If A's salary is 20% more than B's, by what percent is B's salary less than A's?
Correct Answer: Option B
Explanation:
B less % = (20/120)×100 = 16.67%.
B less % = (20/120)×100 = 16.67%.
This question belongs to:
Maths
Percentage
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