Two alloys have copper 70% and 40%. Mixed to get 55% copper. Ratio of mixing: MCQ with Answer and Explanation
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Question #2
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The cost of an article is Rs. 500. It is marked up by 40% and then a discount of 30% is given. What is the selling price?
Correct Answer: Option D
Explanation:
MP = 500×1.4=700, SP=700×0.7=490.
MP = 500×1.4=700, SP=700×0.7=490.
This question belongs to:
Maths
Percentage
Question #3
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A man spends 70% of his income. If his income increases by 20% and his expenditure increases by 10%, what is the percentage increase in his savings?
Correct Answer: Option D
Explanation:
Let income = 100, expenditure = 70, savings = 30. New income = 120. New expenditure = 77. New savings = 120 - 77 = 43. Increase in savings = 43 - 30 = 13. Percentage increase = (13 / 30) * 100% = 43.33%.
Let income = 100, expenditure = 70, savings = 30. New income = 120. New expenditure = 77. New savings = 120 - 77 = 43. Increase in savings = 43 - 30 = 13. Percentage increase = (13 / 30) * 100% = 43.33%.
This question belongs to:
Maths
Percentage
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