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Q4. In an alloy, Zinc and Copper are in the ratio 1 : 2. In the second alloy, the same elements are in the ratio 2 : 3. If there two alloys combined to form a new alloy in which two elements are in the ratio 5 : 8, the ratio of these two alloys in the new alloys is –
(a) 3 : 10
(b) 7 : 3
(c) 3 : 7
(d) 10 : 3
Q5. A jar contained a mixture for two liquids A and B in the ratio 4 : 1. When 10 L of the mixture was taken out and 10 L of liquid B was poured into the jar, this ratio becomes 2 : 3. The quantity of liquid A contained in the gas initially was –
(a) 4 L
(b) 12 L
(c) 8 L
(d) 16 L
Directions(5-10): observe the graph and answer the question based on it
Q6. The percent increase in population from 1971 to 1981 –
Q7. In which census year, the percent increase in population is highest as compared to that in previous census years?
Q8. In which census year, the percent increase in population is least as compared to that in the previous census year?
Q9. Per year increase in population from the year 1931 to 1981 is
Q10. A and B enter into a partnership by making investment in the ratio 1 :2, 5% of the total profit goes to charity. If B’s share is Rs 760, then total profit is –
(a) Rs 2400
(b) Rs 1800
(c) Rs 1200
(d) Rs. 1560