Question
 In which year was the first reliable measurement on
the properties of gases made by Anglo-Irish scientist Robert Boyle?Solution
The correct answer is D
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Average income of 'Ishan' and 'John' together is Rs. 60,000. Whereas the average expenditure of 'Ishan' and 'John' is Rs. 38,000....
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Total monthly income of A, B and C is Rs.1,02,720.A, B and C save 20%, 10% and 25%, of their incomes. If the ratio of their monthly expenditures is 3 : ...
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